# OpcStateNode Class

> Reference: Defines an unique state across all states defined in a state machine (e.g. OpcStateMachineNode).

<span class="api-meta">since v2.29</span>

<dl class="api-definition">
<dt>Namespace</dt>
<dd><a href="../namespaces/opc.uafx">Opc.UaFx</a></dd>
<dt>Assembly</dt>
<dd>Opc.UaFx.Advanced.dll</dd>
<dt>Package</dt>
<dd>Opc.UaFx.Advanced v2.59.0</dd>
<dt>Members</dt>
<dd><a href="./members">OpcStateNode Members</a></dd>
</dl>

Defines an unique state across all states defined in a state machine (e.g. [OpcStateMachineNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcstatemachinenode/)).

## Syntax

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

```csharp
public class OpcStateNode : OpcObjectNode
```

</div>

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

```vbnet
<OpcNodeType(2307)>
Public Class OpcStateNode
    Inherits OpcObjectNode
```

</div>

## Inheritance

[Object](https://learn.microsoft.com/dotnet/api/system.object) → [OpcNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnode/) → [OpcInstanceNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcinstancenode/) → [OpcObjectNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcobjectnode/) → **OpcStateNode**

## Implements

<ul class="api-implements">
<li><a href="../opc.uafx.iopcnode/">IOpcNode</a></li>
<li><a href="../opc.uafx.iopcnodeinfo/">IOpcNodeInfo</a></li>
</ul>

## Constructors

| Name | Description |
|---|---|
| [OpcStateNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcstatenode/members#opcstatenode)<span class="api-meta">6 overloads</span> | Initializes a new instance of the OpcStateNode class using the `content` as the instance to wrap. |

## Properties

| Name | Description |
|---|---|
| [DefaultTypeDefinitionId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcstatenode/members#defaulttypedefinitionid)<span class="api-meta">protected · override</span> | Gets the default identifier which identifies the type that defines the underlying node reference within this [OpcInstanceNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcinstancenode/) is referenced by its parent node. |
| [StateNumber](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcstatenode/members#statenumber) | Gets or sets an unique number for the state represented by this OpcStateNode. |
| [StateNumberNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcstatenode/members#statenumbernode) | Gets the [OpcPropertyNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcpropertynode/) of the [StateNumber](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcstatenode/members#statenumber) property. |

Inherits members from [OpcObjectNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcobjectnode/members), [OpcInstanceNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcinstancenode/members), [OpcNode](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnode/members).

## Applies to

| Package | Versions |
|---|---|
| Opc.UaFx.Advanced | v2.29–v2.59 |