# OpcNamespace Members > Reference: Represents a nominal space used to categorize information like nodes, types, identifiers, etc. under a logical topic.
Type
OpcNamespace
Namespace
Opc.UaFx
Assembly
Opc.UaFx.Advanced.dll
Package
Opc.UaFx.Advanced v2.59.0
Also in
Opc.UaFx.Client
## Fields ### UriHost static Specifies that an [Uri](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#uri) is a pointer to a OPC UA namespace without a specific namespace [Host](https://learn.microsoft.com/dotnet/api/system.uri.host).
```csharp public static readonly string UriHost ```
```vbnet Public Shared ReadOnly UriHost As String ```
**Field value** [String](https://learn.microsoft.com/dotnet/api/system.string) ### UriScheme static Specifies that an [Uri](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#uri) is a pointer to a OPC UA namespace without a specific namespace [Scheme](https://learn.microsoft.com/dotnet/api/system.uri.scheme).
```csharp public static readonly string UriScheme ```
```vbnet Public Shared ReadOnly UriScheme As String ```
**Field value** [String](https://learn.microsoft.com/dotnet/api/system.string) ## Properties ### Default static Gets the default namespace used in cases there the concrete does not matter or is just unknown.
```csharp public static OpcNamespace Default { get; } ```
```vbnet Public Shared ReadOnly Property [Default] As OpcNamespace ```
**Property value** [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) An instance of the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) class its [IsDefault](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#isdefault) property always returns the value true. While its [Index](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#index) property is equals to zero, its [Uri](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#uri) and [Value](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#value) properties always return a null reference (Nothing in Visual Basic). ### Index Gets the index of the namespace within all namespaces of a server.
```csharp public int Index { get; } ```
```vbnet Public ReadOnly Property Index As Integer ```
**Property value** [Int32](https://learn.microsoft.com/dotnet/api/system.int32) The index value which refers to the namespace in the namespace array of the server this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) represents. **Remarks** The available namespaces of a server can be retrieved through reading the value of the namespaces-node using the node identifier 'OpcObjectTypes.Server.Namespaces'. ### IsAbsolute Gets a value indicating whether the namespace is absolute.
```csharp public bool IsAbsolute { get; } ```
```vbnet Public ReadOnly Property IsAbsolute As Boolean ```
**Property value** [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) The value true if an [Uri](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#uri) or [Value](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#value) is given; otherwise the value false. ### IsDefault Gets a value indicating whether the namespace defines the default namespace without to refer to a specific address space.
```csharp public bool IsDefault { get; } ```
```vbnet Public ReadOnly Property IsDefault As Boolean ```
**Property value** [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) The value true if the namespace points to the generic address space; otherwise the value false if the namespace points to a foundation or user defined address space. ### IsResolved Gets a value indicating whether the namespace is resolved regarding its [Index](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#index), [Uri](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#uri) and [Value](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#value).
```csharp public bool IsResolved { get; } ```
```vbnet Public ReadOnly Property IsResolved As Boolean ```
**Property value** [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) The value true if [Index](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#index) is not equals zero and [Uri](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#uri) and [Value](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#value) are not a null reference (Nothing in Visual Basic). **Remarks** In case there this property provides the value true any call to [Resolve](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#resolve) will have no effect to the [Index](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#index) nor to the [Uri](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#uri) and [Value](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#value) properties. ### Scope since v2.12 Gets scope within the current [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) has been declared and its metadata applies to.
```csharp public OpcNamespaceScope Scope { get; } ```
```vbnet Public ReadOnly Property Scope As OpcNamespaceScope ```
**Property value** [OpcNamespaceScope](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespacescope/) One of the members defined by the [OpcNamespaceScope](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespacescope/) enumeration. ### Uri Gets the uniform resource identifier (URI) of the namespace represented and referred to by the [Index](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#index).
```csharp public Uri Uri { get; } ```
```vbnet Public ReadOnly Property Uri As Uri ```
**Property value** [Uri](https://learn.microsoft.com/dotnet/api/system.uri) The [Uri](https://learn.microsoft.com/dotnet/api/system.uri) to that the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) refers using the [Index](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#index). ### Value since v2.8 Gets the intrinsic value of the namespace represented and referred to by the [Index](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#index).
```csharp public string Value { get; } ```
```vbnet Public ReadOnly Property Value As String ```
**Property value** [String](https://learn.microsoft.com/dotnet/api/system.string) The [string](https://learn.microsoft.com/dotnet/api/system.string) to that the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) refers using the [Index](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#index). ## Methods ### Clear static Empties the known namespaces.
```csharp public static void Clear() ```
```vbnet Public Shared Sub Clear() ```
**Remarks** All namespaces retrieved until [Clear](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#clear) is called are no longer referenced by the global / static namespace cache. Any so far retrieved namespaces are kept resolved / existing / valid and kept unchanged by subsequent global namespace operations, because they are not longer tracked nor updated by further global namespace retrieval nor resolve operations. ### CompareTo 2 overloads | Overload | Description | |---|---| | [CompareTo(object)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#compareto-system-object) | Compares the current [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) with the `other`. | | [CompareTo(OpcNamespace)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#compareto-opc-uafx-opcnamespace) | Compares the current [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) with another [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/). | #### CompareTo(object) Compares the current [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) with the `other`.
```csharp public int CompareTo(object other) ```
```vbnet Public Function CompareTo(other As Object) As Integer ```
**Parameters** | Name | Type | Description | |---|---|---| | `other` | [Object](https://learn.microsoft.com/dotnet/api/system.object) | The [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) to compare with this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/). | **Returns** [Int32](https://learn.microsoft.com/dotnet/api/system.int32) A 32-bit signed integer that indicates the relative order of the objects being compared ([CompareTo(object)](https://learn.microsoft.com/dotnet/api/system.icomparable.compareto)). **Implements** [CompareTo(object)](https://learn.microsoft.com/dotnet/api/system.icomparable.compareto) #### CompareTo(OpcNamespace) Compares the current [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) with another [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/).
```csharp public int CompareTo(OpcNamespace other) ```
```vbnet Public Function CompareTo(other As OpcNamespace) As Integer ```
**Parameters** | Name | Type | Description | |---|---|---| | `other` | [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) | The [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) to compare with this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/). | **Returns** [Int32](https://learn.microsoft.com/dotnet/api/system.int32) A 32-bit signed integer that indicates the relative order of the objects being compared ([CompareTo(T)](https://learn.microsoft.com/dotnet/api/system.icomparable-1.compareto)). **Implements** [CompareTo(OpcNamespace)](https://learn.microsoft.com/dotnet/api/system.icomparable-1.compareto) ### Create static · 4 overloads | Overload | Description | |---|---| | [Create(Uri)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#create-system-uri)static | Creates a [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) from the [Uri](https://learn.microsoft.com/dotnet/api/system.uri) specified. | | [Create(Uri, int)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#create-system-uri-system-int32)static · since v2.8 | Creates a [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) from the [Uri](https://learn.microsoft.com/dotnet/api/system.uri) specified. | | [Create(string)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#create-system-string)static · since v2.8 | Creates a [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) using the `value` specified. | | [Create(string, int)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#create-system-string-system-int32)static · since v2.8 | Creates a [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) using the `value` and `index` specified. | #### Create(Uri) static Creates a [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) from the [Uri](https://learn.microsoft.com/dotnet/api/system.uri) specified. If `uri` provides [Port](https://learn.microsoft.com/dotnet/api/system.uri.port) information, the [Port](https://learn.microsoft.com/dotnet/api/system.uri.port) is used for the [Index](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#index) of the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) created.
```csharp public static OpcNamespace Create(Uri uri) ```
```vbnet Public Shared Function Create(uri As Uri) As OpcNamespace ```
**Parameters** | Name | Type | Description | |---|---|---| | `uri` | [Uri](https://learn.microsoft.com/dotnet/api/system.uri) | A [Uri](https://learn.microsoft.com/dotnet/api/system.uri) that contains a namespace. | **Returns** [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) An instance of the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) class. **Exceptions** | Exception | Condition | |---|---| | [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `uri` is a null reference (Nothing in Visual Basic). | | [FormatException](https://learn.microsoft.com/dotnet/api/system.formatexception) | The `uri` is not a valid namespace. | #### Create(Uri, int) static · since v2.8 Creates a [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) from the [Uri](https://learn.microsoft.com/dotnet/api/system.uri) specified. If `uri` provides [Port](https://learn.microsoft.com/dotnet/api/system.uri.port) information, the [Port](https://learn.microsoft.com/dotnet/api/system.uri.port) is used for the [Index](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#index) of the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) created, if `index` not greater than zero.
```csharp public static OpcNamespace Create(Uri uri, int index) ```
```vbnet Public Shared Function Create(uri As Uri, index As Integer) As OpcNamespace ```
**Parameters** | Name | Type | Description | |---|---|---| | `uri` | [Uri](https://learn.microsoft.com/dotnet/api/system.uri) | A [Uri](https://learn.microsoft.com/dotnet/api/system.uri) that contains a namespace. | | `index` | [Int32](https://learn.microsoft.com/dotnet/api/system.int32) | The positive number which identifies the namespace. A value within the range of zero to [MaxValue](https://learn.microsoft.com/dotnet/api/system.uint16.maxvalue). | **Returns** [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) An instance of the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) class. **Exceptions** | Exception | Condition | |---|---| | [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `uri` is a null reference (Nothing in Visual Basic). | | [ArgumentOutOfRangeException](https://learn.microsoft.com/dotnet/api/system.argumentoutofrangeexception) | The `index` is less than zero or greater than [MaxValue](https://learn.microsoft.com/dotnet/api/system.uint16.maxvalue). | | [FormatException](https://learn.microsoft.com/dotnet/api/system.formatexception) | The `uri` is not a valid namespace. | #### Create(string) static · since v2.8 Creates a [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) using the `value` specified.
```csharp public static OpcNamespace Create(string value) ```
```vbnet Public Shared Function Create(value As String) As OpcNamespace ```
**Parameters** | Name | Type | Description | |---|---|---| | `value` | [String](https://learn.microsoft.com/dotnet/api/system.string) | The [string](https://learn.microsoft.com/dotnet/api/system.string) value or a null reference (Nothing in Visual Basic) of the namespace to represent. | **Returns** [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) An instance of the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) class. #### Create(string, int) static · since v2.8 Creates a [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) using the `value` and `index` specified.
```csharp public static OpcNamespace Create(string value, int index) ```
```vbnet Public Shared Function Create(value As String, index As Integer) As OpcNamespace ```
**Parameters** | Name | Type | Description | |---|---|---| | `value` | [String](https://learn.microsoft.com/dotnet/api/system.string) | The [string](https://learn.microsoft.com/dotnet/api/system.string) value or a null reference (Nothing in Visual Basic) of the namespace to represent and referred to by the `index`. | | `index` | [Int32](https://learn.microsoft.com/dotnet/api/system.int32) | The positive number which identifies the namespace. A value within the range of zero to [MaxValue](https://learn.microsoft.com/dotnet/api/system.uint16.maxvalue). | **Returns** [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) An instance of the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) class. **Exceptions** | Exception | Condition | |---|---| | [ArgumentOutOfRangeException](https://learn.microsoft.com/dotnet/api/system.argumentoutofrangeexception) | The `index` is less than zero or greater than [MaxValue](https://learn.microsoft.com/dotnet/api/system.uint16.maxvalue). | ### Equals 2 overloads | Overload | Description | |---|---| | [Equals(object)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#equals-system-object)override | Determines whether the specified `other` is equal to this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/). | | [Equals(OpcNamespace)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#equals-opc-uafx-opcnamespace) | Determines whether the specified `other` is equal to this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/). | #### Equals(object) override Determines whether the specified `other` is equal to this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/).
```csharp public override bool Equals(object other) ```
```vbnet Public Overrides Function Equals(other As Object) As Boolean ```
**Parameters** | Name | Type | Description | |---|---|---| | `other` | [Object](https://learn.microsoft.com/dotnet/api/system.object) | The [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) to compare to the current [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/). | **Returns** [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) The value true if the specified [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) is equal to the current [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/); otherwise the value false. **Overrides** [Equals(object)](https://learn.microsoft.com/dotnet/api/system.object.equals#system-object-equals%28system-object%29) #### Equals(OpcNamespace) Determines whether the specified `other` is equal to this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/).
```csharp public bool Equals(OpcNamespace other) ```
```vbnet Public Function Equals(other As OpcNamespace) As Boolean ```
**Parameters** | Name | Type | Description | |---|---|---| | `other` | [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) | The [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) to compare to the current [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/). | **Returns** [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) The value true if the specified [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) is equal to the current [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/); otherwise the value false. **Implements** [Equals(OpcNamespace)](https://learn.microsoft.com/dotnet/api/system.iequatable-1.equals) ### Get static · 5 overloads | Overload | Description | |---|---| | [Get(int)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#get-system-int32)static | Retrieves the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) known under the `namespaceIndex` specified. | | [Get(int, string)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#get-system-int32-system-string)static | Retrieves the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) known under the `namespaceIndex` and `namespaceValue` specified. | | [Get(int, Uri)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#get-system-int32-system-uri)static | Retrieves the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) known under the `namespaceIndex` and `namespaceUri` specified. | | [Get(string)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#get-system-string)static | Retrieves the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) using the information provided by the `namespaceUriOrValue` specified. | | [Get(Uri)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#get-system-uri)static | Retrieves the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) with the information provided by the `namespaceUri` specified. | #### Get(int) static Retrieves the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) known under the `namespaceIndex` specified.
```csharp public static OpcNamespace Get(int namespaceIndex) ```
```vbnet Public Shared Function [Get](namespaceIndex As Integer) As OpcNamespace ```
**Parameters** | Name | Type | Description | |---|---|---| | `namespaceIndex` | [Int32](https://learn.microsoft.com/dotnet/api/system.int32) | The index of the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) to retrieve. | **Returns** [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) If `namespaceIndex` is equals zero the [Default](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#default) namespace; otherwise if there is a known namespace with the index specified the reference to the existing [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/). If there does no namespace exist under the index specified by `namespaceIndex` a new namespace with that index is created, added to the indexed namespaces and the reference to the new [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) is returned. #### Get(int, string) static Retrieves the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) known under the `namespaceIndex` and `namespaceValue` specified.
```csharp public static OpcNamespace Get(int namespaceIndex, string namespaceValue) ```
```vbnet Public Shared Function [Get]( namespaceIndex As Integer, namespaceValue As String) As OpcNamespace ```
**Parameters** | Name | Type | Description | |---|---|---| | `namespaceIndex` | [Int32](https://learn.microsoft.com/dotnet/api/system.int32) | The index of the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) to retrieve. | | `namespaceValue` | [String](https://learn.microsoft.com/dotnet/api/system.string) | The [Uri](https://learn.microsoft.com/dotnet/api/system.uri)-formatted or [string](https://learn.microsoft.com/dotnet/api/system.string)-based representation of the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) to retrieve. | **Returns** [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) If `namespaceIndex` is equals zero and the [Port](https://learn.microsoft.com/dotnet/api/system.uri.port) portion of the `namespaceValue` is zero too the [Default](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#default) namespace; otherwise if there is a known namespace with the index specified by `namespaceIndex` or (if this parameter is equals zero) a known namespace with the index defined by the [Port](https://learn.microsoft.com/dotnet/api/system.uri.port) portion of the `namespaceValue` the reference to the existing [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/). If there does no namespace exist under the index and value specified by `namespaceIndex` and `namespaceValue` a new namespace with that index and value is created, added to the indexed / unindexed namespaces and the reference to the new [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) is returned. **Exceptions** | Exception | Condition | |---|---| | [ArgumentException](https://learn.microsoft.com/dotnet/api/system.argumentexception) | The `namespaceValue` is an empty string. | | [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `namespaceValue` is a null reference (Nothing in Visual Basic). | | [FormatException](https://learn.microsoft.com/dotnet/api/system.formatexception) | The `namespaceValue` is not a valid namespace. | #### Get(int, Uri) static Retrieves the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) known under the `namespaceIndex` and `namespaceUri` specified.
```csharp public static OpcNamespace Get(int namespaceIndex, Uri namespaceUri) ```
```vbnet Public Shared Function [Get]( namespaceIndex As Integer, namespaceUri As Uri) As OpcNamespace ```
**Parameters** | Name | Type | Description | |---|---|---| | `namespaceIndex` | [Int32](https://learn.microsoft.com/dotnet/api/system.int32) | The index of the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) to retrieve. | | `namespaceUri` | [Uri](https://learn.microsoft.com/dotnet/api/system.uri) | The [Uri](https://learn.microsoft.com/dotnet/api/system.uri) of the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) to retrieve. | **Returns** [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) If `namespaceIndex` is equals zero and the [Port](https://learn.microsoft.com/dotnet/api/system.uri.port) portion of the `namespaceUri` is zero too the [Default](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#default) namespace; otherwise if there is a known namespace with the index specified by `namespaceIndex` or (if this parameter is equals zero) a known namespace with the index defined by the [Port](https://learn.microsoft.com/dotnet/api/system.uri.port) portion of the `namespaceUri` the reference to the existing [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/). If there does no namespace exist under the index and uri specified by `namespaceIndex` and `namespaceUri` a new namespace with that index and uri is created, added to the indexed / unindexed namespaces and the reference to the new [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) is returned. **Exceptions** | Exception | Condition | |---|---| | [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `namespaceUri` is a null reference (Nothing in Visual Basic). | | [FormatException](https://learn.microsoft.com/dotnet/api/system.formatexception) | The `namespaceUri` is not a valid namespace. | #### Get(string) static Retrieves the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) using the information provided by the `namespaceUriOrValue` specified.
```csharp public static OpcNamespace Get(string namespaceUriOrValue) ```
```vbnet Public Shared Function [Get](namespaceUriOrValue As String) As OpcNamespace ```
**Parameters** | Name | Type | Description | |---|---|---| | `namespaceUriOrValue` | [String](https://learn.microsoft.com/dotnet/api/system.string) | The [string](https://learn.microsoft.com/dotnet/api/system.string)-based representation or [Uri](https://learn.microsoft.com/dotnet/api/system.uri)-formatted string of the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) to retrieve. | **Returns** [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) If [Host](https://learn.microsoft.com/dotnet/api/system.uri.host) portion of the `namespaceUriOrValue` is equals to [UriHost](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#urihost) and the [Port](https://learn.microsoft.com/dotnet/api/system.uri.port) does not refer to an indexed namespace the [Default](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#default) namespace; otherwise if there is a known namespace with the index specified by the [Port](https://learn.microsoft.com/dotnet/api/system.uri.port) portion the reference to the existing [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/). If there does no namespace exist under the index or `namespaceUriOrValue` specified a new namespace with that [Uri](https://learn.microsoft.com/dotnet/api/system.uri) is created, added to the indexed / unindexed namespaces and the reference to the new [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) is returned. **Exceptions** | Exception | Condition | |---|---| | [ArgumentException](https://learn.microsoft.com/dotnet/api/system.argumentexception) | The `namespaceUriOrValue` is an empty string. | | [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `namespaceUriOrValue` is a null reference (Nothing in Visual Basic). | | [FormatException](https://learn.microsoft.com/dotnet/api/system.formatexception) | The `namespaceUriOrValue` is not a valid namespace. | #### Get(Uri) static Retrieves the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) with the information provided by the `namespaceUri` specified.
```csharp public static OpcNamespace Get(Uri namespaceUri) ```
```vbnet Public Shared Function [Get](namespaceUri As Uri) As OpcNamespace ```
**Parameters** | Name | Type | Description | |---|---|---| | `namespaceUri` | [Uri](https://learn.microsoft.com/dotnet/api/system.uri) | The [Uri](https://learn.microsoft.com/dotnet/api/system.uri) of the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) to retrieve. | **Returns** [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) If [Host](https://learn.microsoft.com/dotnet/api/system.uri.host) portion of the `namespaceUri` is equals to [UriHost](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#urihost) and the [Port](https://learn.microsoft.com/dotnet/api/system.uri.port) does not refer to an indexed namespace the [Default](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#default) namespace; otherwise if there is a known namespace with the index specified by the [Port](https://learn.microsoft.com/dotnet/api/system.uri.port) portion the reference to the existing [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/). If there does no namespace exist under the index or `namespaceUri` specified a new namespace with that [Uri](https://learn.microsoft.com/dotnet/api/system.uri) is created, added to the indexed / unindexed namespaces and the reference to the new [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) is returned. **Exceptions** | Exception | Condition | |---|---| | [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `namespaceUri` is a null reference (Nothing in Visual Basic). | ### GetHashCode override Retrieves a hash code for this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/).
```csharp public override int GetHashCode() ```
```vbnet Public Overrides Function GetHashCode() As Integer ```
**Returns** [Int32](https://learn.microsoft.com/dotnet/api/system.int32) An [int](https://learn.microsoft.com/dotnet/api/system.int32) that contains the hash code for the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/). **Overrides** [GetHashCode()](https://learn.microsoft.com/dotnet/api/system.object.gethashcode) ### GetId 8 overloads | Overload | Description | |---|---| | [GetId(byte\[\])](#getid-system-byte-array) | Retrieves a new [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the opaque `value` and this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/). | | [GetId(int)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#getid-system-int32) | Retrieves a new [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the numeric `value` and this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/). | | [GetId(uint)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#getid-system-uint32) | Retrieves a new [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the numeric `value` and this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/). | | [GetId(Guid)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#getid-system-guid) | Retrieves a new [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the general unique identifier (= GUID) `value` and this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/). | | [GetId(string)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#getid-system-string) | Retrieves a new [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the [string](https://learn.microsoft.com/dotnet/api/system.string)`value` and this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/). | | [GetId(string, OpcNamePath)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#getid-system-string-opc-uafx-opcnamepath) | Retrieves a new [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the [string](https://learn.microsoft.com/dotnet/api/system.string)`value`, this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) and the `path`. | | [GetId(string, params OpcName\[\])](#getid-system-string-opc-uafx-opcname-array) | Retrieves a new [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the [string](https://learn.microsoft.com/dotnet/api/system.string)`value`, this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) and the `pathElements`. | | [GetId(object)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#getid-system-object)since v2.14 | Retrieves a new [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the `value` and this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/). | #### GetId(byte\[\]) Retrieves a new [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the opaque `value` and this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/).
```csharp public OpcNodeId GetId(byte[] value) ```
```vbnet Public Function GetId(value As Byte()) As OpcNodeId ```
**Parameters** | Name | Type | Description | |---|---|---| | `value` | [Byte](https://learn.microsoft.com/dotnet/api/system.byte)[] | The opaque value of the identifier. | **Returns** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) A new instance of the [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the `value` as the identifier value and this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) as the [Namespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/members#namespace). #### GetId(int) Retrieves a new [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the numeric `value` and this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/).
```csharp public OpcNodeId GetId(int value) ```
```vbnet Public Function GetId(value As Integer) As OpcNodeId ```
**Parameters** | Name | Type | Description | |---|---|---| | `value` | [Int32](https://learn.microsoft.com/dotnet/api/system.int32) | The numeric value of the identifier. | **Returns** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) A new instance of the [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the `value` as the identifier value and this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) as the [Namespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/members#namespace). #### GetId(uint) Retrieves a new [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the numeric `value` and this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/).
```csharp public OpcNodeId GetId(uint value) ```
```vbnet Public Function GetId(value As UInteger) As OpcNodeId ```
**Parameters** | Name | Type | Description | |---|---|---| | `value` | [UInt32](https://learn.microsoft.com/dotnet/api/system.uint32) | The numeric value of the identifier. | **Returns** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) A new instance of the [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the `value` as the identifier value and this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) as the [Namespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/members#namespace). #### GetId(Guid) Retrieves a new [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the general unique identifier (= GUID) `value` and this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/).
```csharp public OpcNodeId GetId(Guid value) ```
```vbnet Public Function GetId(value As Guid) As OpcNodeId ```
**Parameters** | Name | Type | Description | |---|---|---| | `value` | [Guid](https://learn.microsoft.com/dotnet/api/system.guid) | The general unique identifier (= GUID) value of the identifier. | **Returns** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) A new instance of the [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the `value` as the identifier value and this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) as the [Namespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/members#namespace). #### GetId(string) Retrieves a new [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the [string](https://learn.microsoft.com/dotnet/api/system.string)`value` and this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/).
```csharp public OpcNodeId GetId(string value) ```
```vbnet Public Function GetId(value As String) As OpcNodeId ```
**Parameters** | Name | Type | Description | |---|---|---| | `value` | [String](https://learn.microsoft.com/dotnet/api/system.string) | The [string](https://learn.microsoft.com/dotnet/api/system.string) value of the identifier. | **Returns** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) A new instance of the [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the `value` as the identifier value and this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) as the [Namespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/members#namespace). #### GetId(string, OpcNamePath) Retrieves a new [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the [string](https://learn.microsoft.com/dotnet/api/system.string)`value`, this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) and the `path`.
```csharp public OpcNodeId GetId(string value, OpcNamePath path) ```
```vbnet Public Function GetId(value As String, path As OpcNamePath) As OpcNodeId ```
**Parameters** | Name | Type | Description | |---|---|---| | `value` | [String](https://learn.microsoft.com/dotnet/api/system.string) | The [string](https://learn.microsoft.com/dotnet/api/system.string) value of the identifier. | | `path` | [OpcNamePath](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamepath/) | The logical (= physically not available in the address space) portion of the identifier. | **Returns** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) A new instance of the [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the `value` as the identifier value, this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) as the [Namespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/members#namespace) and the `path` specified for the [Path](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/members#path). #### GetId(string, params OpcName\[\]) Retrieves a new [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the [string](https://learn.microsoft.com/dotnet/api/system.string)`value`, this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) and the `pathElements`.
```csharp public OpcNodeId GetId(string value, params OpcName[] pathElements) ```
```vbnet Public Function GetId( value As String, ParamArray pathElements As OpcName()) As OpcNodeId ```
**Parameters** | Name | Type | Description | |---|---|---| | `value` | [String](https://learn.microsoft.com/dotnet/api/system.string) | The [string](https://learn.microsoft.com/dotnet/api/system.string) value of the identifier. | | `pathElements` | params [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/)[] | The elements of the [OpcNamePath](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamepath/) to use as the logical (= physically not available in the address space) portion of the identifier. | **Returns** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) A new instance of the [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the `value` as the identifier value, this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) as the [Namespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/members#namespace) and the `pathElements` for the [Path](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/members#path). #### GetId(object) since v2.14 Retrieves a new [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the `value` and this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/).
```csharp public OpcNodeId GetId(object value) ```
```vbnet Public Function GetId(value As Object) As OpcNodeId ```
**Parameters** | Name | Type | Description | |---|---|---| | `value` | [Object](https://learn.microsoft.com/dotnet/api/system.object) | The value of the identifier. | **Returns** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) A new instance of the [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the `value` as the identifier value and this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) as the [Namespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/members#namespace). **Exceptions** | Exception | Condition | |---|---| | [ArgumentException](https://learn.microsoft.com/dotnet/api/system.argumentexception) | The type of `value` is not supported. | ### GetName Retrieves a new [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) using the `name` and this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/).
```csharp public OpcName GetName(string name) ```
```vbnet Public Function GetName(name As String) As OpcName ```
**Parameters** | Name | Type | Description | |---|---|---| | `name` | [String](https://learn.microsoft.com/dotnet/api/system.string) | The value of the [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) to create. | **Returns** [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) A new instance of the [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) using the `name` as the [Value](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#value) and this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) as the [Namespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#namespace). ### GetNextId since v2.29 Retrieves a new [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the next available numeric identifier within this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/).
```csharp public OpcNodeId GetNextId() ```
```vbnet Public Function GetNextId() As OpcNodeId ```
**Returns** [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) A new instance of the [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) using the next available numeric identifier within this [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) as the [Namespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/members#namespace). ### Parse static Converts a namespace string to a [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) instance.
```csharp public static OpcNamespace Parse(string value) ```
```vbnet Public Shared Function Parse(value As String) As OpcNamespace ```
**Parameters** | Name | Type | Description | |---|---|---| | `value` | [String](https://learn.microsoft.com/dotnet/api/system.string) | A string that contains a namespace. | **Returns** [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) An instance of the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) class. **Exceptions** | Exception | Condition | |---|---| | [FormatException](https://learn.microsoft.com/dotnet/api/system.formatexception) | The `value` is not a valid namespace. | ### Resolve Resolves missing OPC UA namespace information using the object specified by `resolver`.
```csharp public void Resolve(IOpcNamespaceResolver resolver) ```
```vbnet Public Sub Resolve(resolver As IOpcNamespaceResolver) ```
**Parameters** | Name | Type | Description | |---|---|---| | `resolver` | [IOpcNamespaceResolver](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.iopcnamespaceresolver/) | An instance implementing the [IOpcNamespaceResolver](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.iopcnamespaceresolver/) interface to use to retrieve additional namespace information so far missed by the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/). | **Exceptions** | Exception | Condition | |---|---| | [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `resolver` is a null reference (Nothing in Visual Basic). | **Remarks** Only missing information is resolved using the `resolver` specified. A once resolved [Index](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#index) or [Value](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#value) is not discarded or re-resolved by subsequent calls of this method (see [IsResolved](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#isresolved)). ### ToString override Returns a string representing the namespace.
```csharp public override string ToString() ```
```vbnet Public Overrides Function ToString() As String ```
**Returns** [String](https://learn.microsoft.com/dotnet/api/system.string) The [Value](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#value) and [Index](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#index) (if non-zero) formatted as string. **Overrides** [ToString()](https://learn.microsoft.com/dotnet/api/system.object.tostring) ### TryCreate static · 2 overloads | Overload | Description | |---|---| | [TryCreate(Uri, out OpcNamespace)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#trycreate-system-uri-opc-uafx-opcnamespace-ref)static | Determines whether a [Uri](https://learn.microsoft.com/dotnet/api/system.uri) is a valid namespace. | | [TryCreate(Uri, int, out OpcNamespace)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#trycreate-system-uri-system-int32-opc-uafx-opcnamespace-ref)static · since v2.8 | Determines whether a [Uri](https://learn.microsoft.com/dotnet/api/system.uri) is a valid namespace. | #### TryCreate(Uri, out OpcNamespace) static Determines whether a [Uri](https://learn.microsoft.com/dotnet/api/system.uri) is a valid namespace.
```csharp public static bool TryCreate(Uri uri, out OpcNamespace nodeNamespace) ```
```vbnet Public Shared Function TryCreate( uri As Uri, nodeNamespace As OpcNamespace) As Boolean ```
**Parameters** | Name | Type | Description | |---|---|---| | `uri` | [Uri](https://learn.microsoft.com/dotnet/api/system.uri) | The [Uri](https://learn.microsoft.com/dotnet/api/system.uri) to validate. | | `nodeNamespace` | out [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) | The [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) version of the `uri`. | **Returns** [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) The value true, if the `uri` is a valid namespace; otherwise the value false. #### TryCreate(Uri, int, out OpcNamespace) static · since v2.8 Determines whether a [Uri](https://learn.microsoft.com/dotnet/api/system.uri) is a valid namespace.
```csharp public static bool TryCreate(Uri uri, int index, out OpcNamespace nodeNamespace) ```
```vbnet Public Shared Function TryCreate( uri As Uri, index As Integer, nodeNamespace As OpcNamespace) As Boolean ```
**Parameters** | Name | Type | Description | |---|---|---| | `uri` | [Uri](https://learn.microsoft.com/dotnet/api/system.uri) | The [Uri](https://learn.microsoft.com/dotnet/api/system.uri) to validate. | | `index` | [Int32](https://learn.microsoft.com/dotnet/api/system.int32) | The index which applies to the `uri` of the namespace to validate. | | `nodeNamespace` | out [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) | The [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) version of the `uri` with the `index` specified. | **Returns** [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) The value true; if the `uri` is a valid namespace; otherwise the value false. **Remarks** The `index` is only used if it is greater than zero; otherwise the [Port](https://learn.microsoft.com/dotnet/api/system.uri.port) of the `uri` is used instead. ### TryParse static Determines whether a string is a valid namespace.
```csharp public static bool TryParse(string value, out OpcNamespace nodeNamespace) ```
```vbnet Public Shared Function TryParse( value As String, nodeNamespace As OpcNamespace) As Boolean ```
**Parameters** | Name | Type | Description | |---|---|---| | `value` | [String](https://learn.microsoft.com/dotnet/api/system.string) | The string to validate. | | `nodeNamespace` | out [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) | The [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) version of the string. | **Returns** [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) The value true, if `value` is a valid namespace; otherwise the value false. ## Operators ### Equality static Returns a value indicating whether two instance of [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) are equal.
```csharp public static bool operator ==(OpcNamespace left, OpcNamespace right) ```
```vbnet Public Shared Operator =(left As OpcNamespace, right As OpcNamespace) As Boolean ```
**Parameters** | Name | Type | Description | |---|---|---| | `left` | [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) | The first [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) to compare. | | `right` | [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) | The second [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) to compare. | **Returns** [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) The value true if left and right are equal; otherwise the value false. ### GreaterThan static Determines whether the first specified [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) object is greater than the second specified [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) object.
```csharp public static bool operator >(OpcNamespace left, OpcNamespace right) ```
```vbnet Public Shared Operator >(left As OpcNamespace, right As OpcNamespace) As Boolean ```
**Parameters** | Name | Type | Description | |---|---|---| | `left` | [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) | The first [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) object. | | `right` | [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) | The second [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) object. | **Returns** [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) The value true if `left` is greater than `right`; otherwise, false. ### GreaterThanOrEqual static Determines whether the first specified [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) object is greater than or equal to the second specified [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) object.
```csharp public static bool operator >=(OpcNamespace left, OpcNamespace right) ```
```vbnet Public Shared Operator >=( left As OpcNamespace, right As OpcNamespace) As Boolean ```
**Parameters** | Name | Type | Description | |---|---|---| | `left` | [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) | The first [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) object. | | `right` | [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) | The second [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) object. | **Returns** [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) The value true if `left` is greater than or equal to `right`; otherwise, false. ### Implicit static · 2 overloads | Overload | Description | |---|---| | [implicit operator OpcNamespace(string)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#op-implicit-system-string-opc-uafx-opcnamespace)static | Converts a [string](https://learn.microsoft.com/dotnet/api/system.string) to an [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) object. | | [implicit operator OpcNamespace(int)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/members#op-implicit-system-int32-opc-uafx-opcnamespace)static | Converts a [int](https://learn.microsoft.com/dotnet/api/system.int32) to an [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) object. | #### implicit operator OpcNamespace(string) static Converts a [string](https://learn.microsoft.com/dotnet/api/system.string) to an [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) object.
```csharp public static implicit operator OpcNamespace(string value) ```
```vbnet Public Shared Widening Operator CType(value As String) As OpcNamespace ```
**Parameters** | Name | Type | Description | |---|---|---| | `value` | [String](https://learn.microsoft.com/dotnet/api/system.string) | A string that represents the namespace. | **Returns** [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) An instance of the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) class initialized from the `value`. #### implicit operator OpcNamespace(int) static Converts a [int](https://learn.microsoft.com/dotnet/api/system.int32) to an [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) object.
```csharp public static implicit operator OpcNamespace(int value) ```
```vbnet Public Shared Widening Operator CType(value As Integer) As OpcNamespace ```
**Parameters** | Name | Type | Description | |---|---|---| | `value` | [Int32](https://learn.microsoft.com/dotnet/api/system.int32) | A [int](https://learn.microsoft.com/dotnet/api/system.int32) that represents the namespace. | **Returns** [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) An instance of the [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) class initialized from the `value`. ### Inequality static Returns a value indicating whether two instances of [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) are not equal.
```csharp public static bool operator !=(OpcNamespace left, OpcNamespace right) ```
```vbnet Public Shared Operator <>( left As OpcNamespace, right As OpcNamespace) As Boolean ```
**Parameters** | Name | Type | Description | |---|---|---| | `left` | [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) | The first [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) to compare. | | `right` | [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) | The second [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) to compare. | **Returns** [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) The value true if left and right are not equal; otherwise the value false. ### LessThan static Determines whether the first specified [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) object is less than the second specified [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) object.
```csharp public static bool operator <(OpcNamespace left, OpcNamespace right) ```
```vbnet Public Shared Operator <(left As OpcNamespace, right As OpcNamespace) As Boolean ```
**Parameters** | Name | Type | Description | |---|---|---| | `left` | [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) | The first [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) object. | | `right` | [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) | The second [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) object. | **Returns** [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) The value true if `left` is less than `right`; otherwise the value false. **Exceptions** | Exception | Condition | |---|---| | [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `left` is a null reference (Nothing in Visual Basic). | ### LessThanOrEqual static Determines whether the first specified [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) object is less than or equal to the second [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) object.
```csharp public static bool operator <=(OpcNamespace left, OpcNamespace right) ```
```vbnet Public Shared Operator <=( left As OpcNamespace, right As OpcNamespace) As Boolean ```
**Parameters** | Name | Type | Description | |---|---|---| | `left` | [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) | The first [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) object. | | `right` | [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) | The second [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) object. | **Returns** [Boolean](https://learn.microsoft.com/dotnet/api/system.boolean) The value true if `left` is less than or equal to `right`; otherwise the value false. **Exceptions** | Exception | Condition | |---|---| | [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `left` is a null reference (Nothing in Visual Basic). |