# OpcClassicApplicationDescription Class

<span class="api-meta">since v2.8</span>

<dl class="api-definition">
<dt>Namespace</dt>
<dd><a href="../namespaces/opc.uafx.classic">Opc.UaFx.Classic</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">OpcClassicApplicationDescription Members</a></dd>
</dl>

Represents the description of an OPC Classic server identified by its class identifier and program identifier on a host.

## Syntax

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

```csharp
public class OpcClassicApplicationDescription
```

</div>

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

```vbnet
Public Class OpcClassicApplicationDescription
```

</div>

## Inheritance

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

## Constructors

| Name | Description |
|---|---|
| [OpcClassicApplicationDescription](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.classic.opcclassicapplicationdescription/members#opcclassicapplicationdescription)<span class="api-meta">3 overloads</span> | Initializes a new instance of the OpcClassicApplicationDescription class using the specified `classId` of a server on the local host. |

## Properties

| Name | Description |
|---|---|
| [ClassId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.classic.opcclassicapplicationdescription/members#classid) | Gets the class identifier of the server. |
| [Host](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.classic.opcclassicapplicationdescription/members#host) | Gets the name of the host of the server. |
| [HostIdentity](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.classic.opcclassicapplicationdescription/members#hostidentity)<span class="api-meta">since v2.12</span> | Gets or sets the identity used to authenticate at the host of the server using DCOM. |
| [Name](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.classic.opcclassicapplicationdescription/members#name) | Gets or sets the display name of the server. |
| [ProgId](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.classic.opcclassicapplicationdescription/members#progid) | Gets the program identifier of the server. |
| [Uri](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.classic.opcclassicapplicationdescription/members#uri) | Gets the URI which identifies the server. |

## Methods

| Name | Description |
|---|---|
| [Create](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.classic.opcclassicapplicationdescription/members#create)<span class="api-meta">static</span> | Creates a description of the server identified by the `uri` specified. |
| [TryCreate](https://www.traeger.de/en/docs/development/opcua/api/v2.59/opc.uafx.classic.opcclassicapplicationdescription/members#trycreate)<span class="api-meta">static</span> | Tries to create a description of the server identified by the `uri` specified. |

## Applies to

| Package | Versions |
|---|---|
| Opc.UaFx.Advanced | v2.8–v2.59 |