# OpcClient.ApplicationName Property

<dl class="api-definition">
<dt>Type</dt>
<dd><a href="./">OpcClient</a></dd>
<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>Members</dt>
<dd><a href="./members">OpcClient Members</a></dd>
<dt>Also in</dt>
<dd>Opc.UaFx.Client</dd>
</dl>

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

Gets or sets the name of the client application.

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

```csharp
public override string ApplicationName { get; set; }
```

</div>

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

```vbnet
Public Overrides Property ApplicationName As String
```

</div>

**Property value**

[String](https://learn.microsoft.com/dotnet/api/system.string)

The name of the application. The default value is "OPC Application" in case there is no entry assembly available; otherwise the value of the [AssemblyTitleAttribute](https://learn.microsoft.com/dotnet/api/system.reflection.assemblytitleattribute) of the entry assembly.

**Overrides**

[ApplicationName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.opcapplicationinstance-2/members#applicationname)

**Remarks**

The name does not have to be unique. In case there is no [SessionName](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.client.opcclient/sessionname) used the ApplicationName is used as the session name instead. The value of this property is also used as the [SubjectName](https://learn.microsoft.com/dotnet/api/system.security.cryptography.x509certificates.x509certificate2.subjectname) of the application certificate whenever an application certificate is to be created/looked-up (from the application certificates store).