# OpcSubscriptionChanges Enum

> Reference: Specifies the changes of an OpcSubscription which are reported by the Changes property.

<dl class="api-definition">
<dt>Namespace</dt>
<dd><a href="../namespaces/opc.uafx.client">Opc.UaFx.Client</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 changes of an [OpcSubscription](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcsubscription/) which are reported by the [Changes](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcsubscriptionchangedeventargs/members#changes) property.

## Syntax

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

```csharp
public enum OpcSubscriptionChanges
```

</div>

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

```vbnet
<Flags>
Public Enum OpcSubscriptionChanges
```

</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) → **OpcSubscriptionChanges**

## Fields

| Name | Value | Description |
|---|---|---|
| <a id="created"></a>`Created` | `1` | The subscription has been created on the server. |
| <a id="deleted"></a>`Deleted` | `2` | The subscription has been deleted on the server. |
| <a id="itemsadded"></a>`ItemsAdded` | `8` | Monitored items have been added to the subscription but not yet created on the server. |
| <a id="itemscreated"></a>`ItemsCreated` | `32` | Monitored items have been created on the server. |
| <a id="itemsdeleted"></a>`ItemsDeleted` | `64` | Monitored items have been deleted on the server. |
| <a id="itemsmodified"></a>`ItemsModified` | `128` | Monitored items have been modified on the server. |
| <a id="itemsremoved"></a>`ItemsRemoved` | `16` | Monitored items have been removed from the subscription but not yet deleted on the server. |
| <a id="modified"></a>`Modified` | `4` | The subscription has been modified on the server. |
| <a id="none"></a>`None` | `0` | The subscription has not changed. |

## Applies to

| Package | Versions |
|---|---|
| Opc.UaFx.Advanced | v2.5–v2.59 |