# OpcUnregisterNodesRequest Members

> Reference: Represents the request of the UnregisterNodes service of OPC UA, which releases nodes registered before using the RegisterNodes service.

<dl class="api-definition">
<dt>Type</dt>
<dd><a href="./">OpcUnregisterNodesRequest</a></dd>
<dt>Namespace</dt>
<dd><a href="../namespaces/opc.uafx.services">Opc.UaFx.Services</a></dd>
<dt>Assembly</dt>
<dd>Opc.UaFx.Advanced.dll</dd>
<dt>Package</dt>
<dd>Opc.UaFx.Advanced v2.59.0</dd>
<dt>Also in</dt>
<dd>Opc.UaFx.Client</dd>
</dl>

Inherits members from [OpcServiceRequest&lt;OpcUnregisterNode, OpcUnregisterNodeCollection&gt;](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.opcservicerequest-2/members), [OpcServiceRequest](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.opcservicerequest/members).

## Constructors

### OpcUnregisterNodesRequest

<span class="api-meta">4 overloads</span>

| Overload | Description |
|---|---|
| [OpcUnregisterNodesRequest(IEnumerable&lt;OpcUnregisterNode&gt;)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.opcunregisternodesrequest/members#opcunregisternodesrequest-system-collections-generic-ienumerable-of-opc-uafx-opcunregisternode) | Initializes a new instance of the [OpcUnregisterNodesRequest](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.opcunregisternodesrequest/) class using the specified `commands` and a new header. |
| [OpcUnregisterNodesRequest(params OpcUnregisterNode\[\])](#opcunregisternodesrequest-opc-uafx-opcunregisternode-array) | Initializes a new instance of the [OpcUnregisterNodesRequest](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.opcunregisternodesrequest/) class using the specified `commands` and a new header. |
| [OpcUnregisterNodesRequest(IOpcServiceRequestHeader, IEnumerable&lt;OpcUnregisterNode&gt;)](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.opcunregisternodesrequest/members#opcunregisternodesrequest-opc-uafx-services-iopcservicerequestheader-system-collections-generic-ienumerable-of-opc-uafx-opcunregisternode) | Initializes a new instance of the [OpcUnregisterNodesRequest](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.opcunregisternodesrequest/) class using the specified `header` and `commands`. |
| [OpcUnregisterNodesRequest(IOpcServiceRequestHeader, params OpcUnregisterNode\[\])](#opcunregisternodesrequest-opc-uafx-services-iopcservicerequestheader-opc-uafx-opcunregisternode-array) | Initializes a new instance of the [OpcUnregisterNodesRequest](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.opcunregisternodesrequest/) class using the specified `header` and `commands`. |

#### OpcUnregisterNodesRequest(IEnumerable&lt;OpcUnregisterNode&gt;)

Initializes a new instance of the [OpcUnregisterNodesRequest](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.opcunregisternodesrequest/) class using the specified `commands` and a new header.

<div class="api-signature" data-lang="csharp">

```csharp
public OpcUnregisterNodesRequest(IEnumerable<OpcUnregisterNode> commands)
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Sub New(commands As IEnumerable(Of OpcUnregisterNode))
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `commands` | [IEnumerable](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1)&lt;[OpcUnregisterNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcunregisternode/)&gt; | The commands which specify the nodes to unregister. |

**Exceptions**

| Exception | Condition |
|---|---|
| [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `commands` is a null reference (Nothing in Visual Basic). |

#### OpcUnregisterNodesRequest(params OpcUnregisterNode\[\])

Initializes a new instance of the [OpcUnregisterNodesRequest](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.opcunregisternodesrequest/) class using the specified `commands` and a new header.

<div class="api-signature" data-lang="csharp">

```csharp
public OpcUnregisterNodesRequest(params OpcUnregisterNode[] commands)
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Sub New(ParamArray commands As OpcUnregisterNode())
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `commands` | params [OpcUnregisterNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcunregisternode/)[] | The commands which specify the nodes to unregister. |

**Exceptions**

| Exception | Condition |
|---|---|
| [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `commands` is a null reference (Nothing in Visual Basic). |

#### OpcUnregisterNodesRequest(IOpcServiceRequestHeader, IEnumerable&lt;OpcUnregisterNode&gt;)

Initializes a new instance of the [OpcUnregisterNodesRequest](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.opcunregisternodesrequest/) class using the specified `header` and `commands`.

<div class="api-signature" data-lang="csharp">

```csharp
public OpcUnregisterNodesRequest(
    IOpcServiceRequestHeader header,
    IEnumerable<OpcUnregisterNode> commands)
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Sub New(
    header As IOpcServiceRequestHeader,
    commands As IEnumerable(Of OpcUnregisterNode))
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `header` | [IOpcServiceRequestHeader](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.iopcservicerequestheader/) | The header of the request. |
| `commands` | [IEnumerable](https://learn.microsoft.com/dotnet/api/system.collections.generic.ienumerable-1)&lt;[OpcUnregisterNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcunregisternode/)&gt; | The commands which specify the nodes to unregister. |

**Exceptions**

| Exception | Condition |
|---|---|
| [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `header` or the `commands` is a null reference (Nothing in Visual Basic). |

#### OpcUnregisterNodesRequest(IOpcServiceRequestHeader, params OpcUnregisterNode\[\])

Initializes a new instance of the [OpcUnregisterNodesRequest](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.opcunregisternodesrequest/) class using the specified `header` and `commands`.

<div class="api-signature" data-lang="csharp">

```csharp
public OpcUnregisterNodesRequest(
    IOpcServiceRequestHeader header,
    params OpcUnregisterNode[] commands)
```

</div>

<div class="api-signature" data-lang="vbnet">

```vbnet
Public Sub New(
    header As IOpcServiceRequestHeader,
    ParamArray commands As OpcUnregisterNode())
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `header` | [IOpcServiceRequestHeader](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.services.iopcservicerequestheader/) | The header of the request. |
| `commands` | params [OpcUnregisterNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcunregisternode/)[] | The commands which specify the nodes to unregister. |

**Exceptions**

| Exception | Condition |
|---|---|
| [ArgumentNullException](https://learn.microsoft.com/dotnet/api/system.argumentnullexception) | The `header` or the `commands` is a null reference (Nothing in Visual Basic). |