# OpcNodeChangesEventArgs Members

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

<dl class="api-definition">
<dt>Type</dt>
<dd><a href="./">OpcNodeChangesEventArgs</a></dd>
<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>
</dl>

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

## Constructors

### OpcNodeChangesEventArgs

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

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

```csharp
public OpcNodeChangesEventArgs(OpcNodeChanges changes)
```

</div>

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

```vbnet
Public Sub New(changes As OpcNodeChanges)
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `changes` | [OpcNodeChanges](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodechanges/) | A bitwise combination of [OpcNodeChanges](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodechanges/) members indicating the changes affected by the event. |

## Properties

### Changes

Gets a value indicating the changes affected by the event.

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

```csharp
public OpcNodeChanges Changes { get; }
```

</div>

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

```vbnet
Public ReadOnly Property Changes As OpcNodeChanges
```

</div>

**Property value**

[OpcNodeChanges](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodechanges/)

A bitwise combination of [OpcNodeChanges](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodechanges/) members.

## Methods

### 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.

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

```csharp
public bool IsChangeOf(OpcNodeChanges change)
```

</div>

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

```vbnet
Public Function IsChangeOf(change As OpcNodeChanges) As Boolean
```

</div>

**Parameters**

| Name | Type | Description |
|---|---|---|
| `change` | [OpcNodeChanges](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodechanges/) | A bitwise combination of [OpcNodeChanges](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodechanges/) members to test against the [Changes](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodechangeseventargs/members#changes) affected by the event. |

**Returns**

[Boolean](https://learn.microsoft.com/dotnet/api/system.boolean)

The value true if the `change` value specified is part of the [Changes](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcnodechangeseventargs/members#changes); otherwise the value false.