# OpcApplicationState Enum

> Reference: Specifies the state of an application instance (see ApplicationState).

<span class="api-meta">since v2.50</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>Also in</dt>
<dd>Opc.UaFx.Client</dd>
</dl>

Specifies the state of an application instance (see [ApplicationState](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.iopcapplicationinstance/members#applicationstate)).

## Syntax

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

```csharp
public enum OpcApplicationState
```

</div>

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

```vbnet
Public Enum OpcApplicationState
```

</div>

## Inheritance

[Object](https://learn.microsoft.com/dotnet/api/system.object) → [ValueType](https://learn.microsoft.com/dotnet/api/system.valuetype) → [Enum](https://learn.microsoft.com/dotnet/api/system.enum) → **OpcApplicationState**

## Fields

| Name | Value | Description |
|---|---|---|
| <a id="active"></a>`Active` | `2` | The application instance is active: a client is connected or reconnected, or a server is started. |
| <a id="created"></a>`Created` | `0` | The application instance has been created and its state has not changed yet. |
| <a id="inactive"></a>`Inactive` | `1` | The application instance is neither active nor paused, e.g. a client which is not connected or a server which is not started. |
| <a id="paused"></a>`Paused` | `3` | The application instance is paused: a server is suspended. |

## Applies to

| Package | Versions |
|---|---|
| Opc.UaFx.Advanced | v2.50–v2.59 |