# OpcOperationType Members

> Reference: Represents the type of an operation which an OpcAccessControlEntry allows or denies.

<dl class="api-definition">
<dt>Type</dt>
<dd><a href="./">OpcOperationType</a></dd>
<dt>Namespace</dt>
<dd><a href="../namespaces/opc.uafx.server">Opc.UaFx.Server</a></dd>
<dt>Assembly</dt>
<dd>Opc.UaFx.Advanced.dll</dd>
<dt>Package</dt>
<dd>Opc.UaFx.Advanced v2.59.0</dd>
</dl>

## Constructors

### OpcOperationType

<span class="api-meta">protected</span>

Initializes a new instance of the [OpcOperationType](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.server.opcoperationtype/) class.

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

```csharp
protected OpcOperationType()
```

</div>

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

```vbnet
Protected Sub New()
```

</div>

## Properties

### Key

<span class="api-meta">abstract</span>

When overridden in a derived class, gets the key which identifies the operation.

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

```csharp
public abstract object Key { get; }
```

</div>

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

```vbnet
Public MustOverride ReadOnly Property Key As Object
```

</div>

**Property value**

[Object](https://learn.microsoft.com/dotnet/api/system.object)

The object which identifies the operation. Operation types whose keys are equal identify the same operation.