# OpcNodeChangesEventArgs Class

> Reference: Provides the event data for the BeforeApplyChanges, AfterApplyChanges and ChangesUnhandled events.

<span class="api-meta">since v2.10</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">OpcNodeChangesEventArgs Members</a></dd>
</dl>

Provides the event data for the [BeforeApplyChanges](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnode/members#beforeapplychanges), [AfterApplyChanges](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnode/members#afterapplychanges) and [ChangesUnhandled](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnode/members#changesunhandled) events.

## Syntax

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

```csharp
public class OpcNodeChangesEventArgs : OpcNodeEventArgs
```

</div>

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

```vbnet
Public Class OpcNodeChangesEventArgs
    Inherits OpcNodeEventArgs
```

</div>

## Inheritance

[Object](https://learn.microsoft.com/dotnet/api/system.object) → [EventArgs](https://learn.microsoft.com/dotnet/api/system.eventargs) → [OpcNodeEventArgs](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodeeventargs/) → **OpcNodeChangesEventArgs**

## Constructors

| Name | Description |
|---|---|
| [OpcNodeChangesEventArgs](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodechangeseventargs/members#opcnodechangeseventargs) | Initializes a new instance of the OpcNodeChangesEventArgs class using the `changes` specified. |

## Properties

| Name | Description |
|---|---|
| [Changes](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodechangeseventargs/members#changes) | Gets a value indicating the changes affected by the event. |

## Methods

| Name | Description |
|---|---|
| [IsChangeOf](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodechangeseventargs/members#ischangeof) | Determines whether a specific [OpcNodeChanges](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodechanges/) value is part of the [Changes](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodechangeseventargs/members#changes) affected by the event. |

Inherits members from [EventArgs](https://learn.microsoft.com/dotnet/api/system.eventargs).

## Applies to

| Package | Versions |
|---|---|
| Opc.UaFx.Advanced | v2.10–v2.59 |