# OpcContext Members
> Reference: Provides information and services about the system which belong to the current situation (process, thread, session, etc.).
- Type
- OpcContext
- Namespace
- Opc.UaFx
- Assembly
- Opc.UaFx.Advanced.dll
- Package
- Opc.UaFx.Advanced v2.59.0
- Also in
- Opc.UaFx.Client
## Properties
### Current
static · since v2.50
Gets or sets the [OpcContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/) for the current thread.
```csharp
public static OpcContext Current { get; }
```
```vbnet
Public Shared ReadOnly Property Current As OpcContext
```
**Property value**
[OpcContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/)
The [OpcContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/) that represents the context of the current thread.
### Empty
static · since v2.9
Gets an empty [OpcContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/) which can be used in cases there a session nor system specific context is not necessarily required.
```csharp
public static OpcContext Empty { get; }
```
```vbnet
Public Shared ReadOnly Property Empty As OpcContext
```
**Property value**
[OpcContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/)
An instance of the [OpcContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/) class without any contextual information.
### Identity
Gets the [OpcUserIdentity](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcuseridentity/) which belongs to the situation represented.
```csharp
public OpcUserIdentity Identity { get; }
```
```vbnet
Public ReadOnly Property Identity As OpcUserIdentity
```
**Property value**
[OpcUserIdentity](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcuseridentity/)
The [OpcUserIdentity](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcuseridentity/) which belongs to the situation represented or a null reference (Nothing in Visual Basic) if there is no identity information available.
### Namespaces
since v2.12
Gets a read-only collection of namespaces valid in the current [OpcContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/).
```csharp
public OpcReadOnlyNamespaceCollection Namespaces { get; }
```
```vbnet
Public ReadOnly Property Namespaces As OpcReadOnlyNamespaceCollection
```
**Property value**
[OpcReadOnlyNamespaceCollection](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcreadonlynamespacecollection/)
An instance of the [OpcReadOnlyNamespaceCollection](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcreadonlynamespacecollection/) class with [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) items for each 'NamespaceUri' used to organize the nodes in an address space.
### NodeIdFactory
Gets the [OpcNodeIdFactory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeidfactory/) used to create new node identifiers using this context.
```csharp
public OpcNodeIdFactory NodeIdFactory { get; }
```
```vbnet
Public ReadOnly Property NodeIdFactory As OpcNodeIdFactory
```
**Property value**
[OpcNodeIdFactory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeidfactory/)
The [OpcNodeIdFactory](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeidfactory/) used through this context or a null reference (Nothing in Visual Basic) if there is not node identifier factory associated with this context.
### Owner
since v2.11
Gets the owner of the current [OpcContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/).
```csharp
public IOpcApplicationInstance Owner { get; }
```
```vbnet
Public ReadOnly Property Owner As IOpcApplicationInstance
```
**Property value**
[IOpcApplicationInstance](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.iopcapplicationinstance/)
An instance implementing the [IOpcApplicationInstance](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.iopcapplicationinstance/) interface which has defined the current [OpcContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/).
### PreferredLocales
virtual · since v2.11
Gets a collection of preferred locales (see [Name](https://learn.microsoft.com/dotnet/api/system.globalization.cultureinfo.name)) to use to localize data and information.
```csharp
public virtual OpcLocaleCollection PreferredLocales { get; }
```
```vbnet
Public Overridable ReadOnly Property PreferredLocales As OpcLocaleCollection
```
**Property value**
[OpcLocaleCollection](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opclocalecollection/)
An instance of the [OpcLocaleCollection](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opclocalecollection/) class with [Name](https://learn.microsoft.com/dotnet/api/system.globalization.cultureinfo.name)s of the cultures to use to localize data and information in order of this [OpcContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/).
### SessionId
virtual
Gets the session identifier which identifies the session within that the context has been created and is valid.
```csharp
public virtual OpcNodeId SessionId { get; }
```
```vbnet
Public Overridable ReadOnly Property SessionId As OpcNodeId
```
**Property value**
[OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/)
The [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) of the session.
## Methods
### Enter
static · 2 overloads · since v2.40
| Overload | Description |
|---|---|
| [Enter(params OpcNamespace\[\])](#enter-opc-uafx-opcnamespace-array)static · since v2.40 | Enters a new [OpcContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/) using the `namespaces` specified. |
| [Enter(IEnumerable<OpcNamespace>)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/members#enter-system-collections-generic-ienumerable-of-opc-uafx-opcnamespace)static · since v2.40 | Enters a new [OpcContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/) using the `namespaces` specified. |
#### Enter(params OpcNamespace\[\])
static · since v2.40
Enters a new [OpcContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/) using the `namespaces` specified.
```csharp
public static OpcContext.Local Enter(params OpcNamespace[] namespaces)
```
```vbnet
Public Shared Function Enter(
ParamArray namespaces As OpcNamespace()) As OpcContext.Local
```
**Parameters**
| Name | Type | Description |
|---|---|---|
| `namespaces` | params [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/)[] | An array of [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) instances known by the [Namespaces](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/members#namespaces) of the new [OpcContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/) to create. |
**Returns**
[OpcContext.Local](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext.local/)
A new instance of the [OpcContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/) class.
#### Enter(IEnumerable<OpcNamespace>)
static · since v2.40
Enters a new [OpcContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/) using the `namespaces` specified.
```csharp
public static OpcContext.Local Enter(IEnumerable namespaces)
```
```vbnet
Public Shared Function Enter(
namespaces As IEnumerable(Of OpcNamespace)) As OpcContext.Local
```
**Parameters**
| Name | Type | Description |
|---|---|---|
| `namespaces` | [IEnumerable](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1)<[OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/)> | A sequence of [OpcNamespace](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnamespace/) instances known by the [Namespaces](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/members#namespaces) of the new [OpcContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/) to create. |
**Returns**
[OpcContext.Local](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext.local/)
A new instance of the [OpcContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/) class.
### GetDataType
6 overloads · since v2.22
| Overload | Description |
|---|---|
| [GetDataType(string)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/members#getdatatype-system-string)since v2.22 | Retrieves the [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object which is known under the `name` specified. |
| [GetDataType(OpcName)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/members#getdatatype-opc-uafx-opcname)since v2.22 | Retrieves the [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object which is known under the `name` specified. |
| [GetDataType(OpcNodeId)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/members#getdatatype-opc-uafx-opcnodeid)since v2.22 | Retrieves the [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object which declares the type which is identified by the `typeId` specified. |
| [GetDataType(Type)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/members#getdatatype-system-type)since v2.22 | Retrieves the [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object which declares the type implemented by the `underlyingType` specified. |
| [GetDataType(OpcEncoding)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/members#getdatatype-opc-uafx-opcencoding)since v2.22 | Retrieves the [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object which declares the type which is identified by the `encoding` specified. |
| [GetDataType(XmlQualifiedName)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/members#getdatatype-system-xml-xmlqualifiedname)since v2.22 | Retrieves the [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object which is known under the `xmlName` specified. |
**Exceptions (all overloads)**
| Exception | Condition |
|---|---|
| [ObjectDisposedException](https://learn.microsoft.com/dotnet/api/system.objectdisposedexception) | The object has been disposed of. |
#### GetDataType(string)
since v2.22
Retrieves the [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object which is known under the `name` specified.
```csharp
public OpcDataTypeInfo GetDataType(string name)
```
```vbnet
Public Function GetDataType(name As String) As OpcDataTypeInfo
```
**Parameters**
| Name | Type | Description |
|---|---|---|
| `name` | [String](https://learn.microsoft.com/dotnet/api/system.string) | The [string](https://learn.microsoft.com/dotnet/api/system.string) to use to identify the [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object to retrieve. |
**Returns**
[OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/)
The [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object its [Name](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/members#name) is equals (regarding its [Value](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#value)) to the `name` specified; otherwise a null reference (Nothing in Visual Basic).
**Exceptions**
| Exception | Condition |
|---|---|
| [ArgumentException](https://learn.microsoft.com/dotnet/api/system.argumentexception) | The `name` is equals [Empty](https://learn.microsoft.com/dotnet/api/system.string.empty). |
| [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `name` is a null reference (Nothing in Visual Basic). |
#### GetDataType(OpcName)
since v2.22
Retrieves the [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object which is known under the `name` specified.
```csharp
public OpcDataTypeInfo GetDataType(OpcName name)
```
```vbnet
Public Function GetDataType(name As OpcName) As OpcDataTypeInfo
```
**Parameters**
| Name | Type | Description |
|---|---|---|
| `name` | [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) | The [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) of the [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object to retrieve. |
**Returns**
[OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/)
The [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object its [Name](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/members#name) is equals to the `name` specified; otherwise a null reference (Nothing in Visual Basic).
**Exceptions**
| Exception | Condition |
|---|---|
| [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `name` is a null reference (Nothing in Visual Basic). |
#### GetDataType(OpcNodeId)
since v2.22
Retrieves the [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object which declares the type which is identified by the `typeId` specified.
```csharp
public OpcDataTypeInfo GetDataType(OpcNodeId typeId)
```
```vbnet
Public Function GetDataType(typeId As OpcNodeId) As OpcDataTypeInfo
```
**Parameters**
| Name | Type | Description |
|---|---|---|
| `typeId` | [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) | The [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) which identifies the [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) to retrieve. |
**Returns**
[OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/)
The [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object which is known under the `typeId` specified or a null reference (Nothing in Visual Basic) if there doesn't exist a known [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object which is associated with the `typeId` specified.
**Exceptions**
| Exception | Condition |
|---|---|
| [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `typeId` is a null reference (Nothing in Visual Basic). |
#### GetDataType(Type)
since v2.22
Retrieves the [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object which declares the type implemented by the `underlyingType` specified.
```csharp
public OpcDataTypeInfo GetDataType(Type underlyingType)
```
```vbnet
Public Function GetDataType(underlyingType As Type) As OpcDataTypeInfo
```
**Parameters**
| Name | Type | Description |
|---|---|---|
| `underlyingType` | [Type](https://learn.microsoft.com/dotnet/api/system.type) | The [Type](https://learn.microsoft.com/dotnet/api/system.type) which implements the [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) to retrieve. |
**Returns**
[OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/)
The [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object which declares the `underlyingType` specified or a null reference (Nothing in Visual Basic) if there isn't a [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object associated with the `underlyingType` specified.
**Exceptions**
| Exception | Condition |
|---|---|
| [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `underlyingType` is a null reference (Nothing in Visual Basic). |
#### GetDataType(OpcEncoding)
since v2.22
Retrieves the [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object which declares the type which is identified by the `encoding` specified.
```csharp
public OpcDataTypeInfo GetDataType(OpcEncoding encoding)
```
```vbnet
Public Function GetDataType(encoding As OpcEncoding) As OpcDataTypeInfo
```
**Parameters**
| Name | Type | Description |
|---|---|---|
| `encoding` | [OpcEncoding](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcencoding/) | The [OpcEncoding](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcencoding/) which identifies the [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) to retrieve. |
**Returns**
[OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/)
The [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object which is known under the `encoding` specified or a null reference (Nothing in Visual Basic) if there doesn't exist a known [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) which is associated with the `encoding` specified.
**Exceptions**
| Exception | Condition |
|---|---|
| [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `encoding` is a null reference (Nothing in Visual Basic). |
#### GetDataType(XmlQualifiedName)
since v2.22
Retrieves the [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object which is known under the `xmlName` specified.
```csharp
public OpcDataTypeInfo GetDataType(XmlQualifiedName xmlName)
```
```vbnet
Public Function GetDataType(xmlName As XmlQualifiedName) As OpcDataTypeInfo
```
**Parameters**
| Name | Type | Description |
|---|---|---|
| `xmlName` | [XmlQualifiedName](https://learn.microsoft.com/dotnet/api/system.xml.xmlqualifiedname) | The [XmlQualifiedName](https://learn.microsoft.com/dotnet/api/system.xml.xmlqualifiedname) of the [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object to retrieve. |
**Returns**
[OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/)
The [OpcDataTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/) object its [XmlName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcdatatypeinfo/members#xmlname) is equals to the `xmlName` specified; otherwise a null reference (Nothing in Visual Basic).
**Exceptions**
| Exception | Condition |
|---|---|
| [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `xmlName` is a null reference (Nothing in Visual Basic). |
### GetNodeType
4 overloads · since v2.50
| Overload | Description |
|---|---|
| [GetNodeType(string)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/members#getnodetype-system-string)since v2.50 | Retrieves the [OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/) object which is known under the `name` specified. |
| [GetNodeType(OpcName)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/members#getnodetype-opc-uafx-opcname)since v2.50 | Retrieves the [OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/) object which is known under the `name` specified. |
| [GetNodeType(OpcNodeId)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/members#getnodetype-opc-uafx-opcnodeid)since v2.50 | Retrieves the [OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/) object which declares the type which is identified by the `typeId` specified. |
| [GetNodeType(Type)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/members#getnodetype-system-type)since v2.50 | Retrieves the [OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/) object which declares the type implemented by the `underlyingType` specified. |
**Exceptions (all overloads)**
| Exception | Condition |
|---|---|
| [ObjectDisposedException](https://learn.microsoft.com/dotnet/api/system.objectdisposedexception) | The object has been disposed of. |
#### GetNodeType(string)
since v2.50
Retrieves the [OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/) object which is known under the `name` specified.
```csharp
public OpcNodeTypeInfo GetNodeType(string name)
```
```vbnet
Public Function GetNodeType(name As String) As OpcNodeTypeInfo
```
**Parameters**
| Name | Type | Description |
|---|---|---|
| `name` | [String](https://learn.microsoft.com/dotnet/api/system.string) | The [string](https://learn.microsoft.com/dotnet/api/system.string) to use to identify the [OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/) object to retrieve. |
**Returns**
[OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/)
The [OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/) object its [Name](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/members#name) is equals (regarding its [Value](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/members#value)) to the `name` specified; otherwise a null reference (Nothing in Visual Basic).
**Exceptions**
| Exception | Condition |
|---|---|
| [ArgumentException](https://learn.microsoft.com/dotnet/api/system.argumentexception) | The `name` is equals [Empty](https://learn.microsoft.com/dotnet/api/system.string.empty). |
| [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `name` is a null reference (Nothing in Visual Basic). |
#### GetNodeType(OpcName)
since v2.50
Retrieves the [OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/) object which is known under the `name` specified.
```csharp
public OpcNodeTypeInfo GetNodeType(OpcName name)
```
```vbnet
Public Function GetNodeType(name As OpcName) As OpcNodeTypeInfo
```
**Parameters**
| Name | Type | Description |
|---|---|---|
| `name` | [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) | The [OpcName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcname/) of the [OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/) object to retrieve. |
**Returns**
[OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/)
The [OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/) object its [Name](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/members#name) is equals to the `name` specified; otherwise a null reference (Nothing in Visual Basic).
**Exceptions**
| Exception | Condition |
|---|---|
| [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `name` is a null reference (Nothing in Visual Basic). |
#### GetNodeType(OpcNodeId)
since v2.50
Retrieves the [OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/) object which declares the type which is identified by the `typeId` specified.
```csharp
public OpcNodeTypeInfo GetNodeType(OpcNodeId typeId)
```
```vbnet
Public Function GetNodeType(typeId As OpcNodeId) As OpcNodeTypeInfo
```
**Parameters**
| Name | Type | Description |
|---|---|---|
| `typeId` | [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) | The [OpcNodeId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeid/) which identifies the [OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/) to retrieve. |
**Returns**
[OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/)
The [OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/) object which is known under the `typeId` specified or a null reference (Nothing in Visual Basic) if there doesn't exist a known [OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/) object which is associated with the `typeId` specified.
**Exceptions**
| Exception | Condition |
|---|---|
| [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `typeId` is a null reference (Nothing in Visual Basic). |
#### GetNodeType(Type)
since v2.50
Retrieves the [OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/) object which declares the type implemented by the `underlyingType` specified.
```csharp
public OpcNodeTypeInfo GetNodeType(Type underlyingType)
```
```vbnet
Public Function GetNodeType(underlyingType As Type) As OpcNodeTypeInfo
```
**Parameters**
| Name | Type | Description |
|---|---|---|
| `underlyingType` | [Type](https://learn.microsoft.com/dotnet/api/system.type) | The [Type](https://learn.microsoft.com/dotnet/api/system.type) which implements the [OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/) to retrieve. |
**Returns**
[OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/)
The [OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/) object which declares the `underlyingType` specified or a null reference (Nothing in Visual Basic) if there isn't a [OpcNodeTypeInfo](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodetypeinfo/) object associated with the `underlyingType` specified.
**Exceptions**
| Exception | Condition |
|---|---|
| [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `underlyingType` is a null reference (Nothing in Visual Basic). |
### OfNode
since v2.50
Creates a context for the `node` specified which uses the information of the current [OpcContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opccontext/).
```csharp
public OpcNodeContext OfNode(OpcNode node)
```
```vbnet
Public Function OfNode(node As OpcNode) As OpcNodeContext
```
**Parameters**
| Name | Type | Description |
|---|---|---|
| `node` | [OpcNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnode/) | The [OpcNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnode/) to that the new context belongs. |
**Returns**
[OpcNodeContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodecontext/)
A new instance of the [OpcNodeContext](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodecontext/) class for the `node`.
**Exceptions**
| Exception | Condition |
|---|---|
| [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `node` is a null reference (Nothing in Visual Basic). |