This documentation is archived and is not being maintained.

BeginEstablish Method

This content is no longer actively maintained. It is provided as is, for anyone who may still be using these technologies, with no warranties or claims of accuracy with regard to the most recent product version or service release.

Establish a connection with the Group Chat server.

Namespace:  Microsoft.Rtc.Collaboration.GroupChat
Assembly:  Microsoft.Rtc.Collaboration.GroupChat (in Microsoft.Rtc.Collaboration.GroupChat.dll)

public IAsyncResult BeginEstablish(
	AsyncCallback userCallback,
	Object state


Type: System.AsyncCallback
The method to be invoked when this asynchronous operation completes.
Type: System.Object
An object to be passed back to the callback.

Return Value

Type: System.IAsyncResult
An IAsyncResult that references this operation.


Thrown if the Lookup Server URI is invalid.


Thrown if the session encounters an error communicating with Office Communications Server.


Thrown when invalid arguments are passed.


Thrown when the endpoint is not in a valid state. An endpoint can only be established once, and cannot be reused after being terminated.

This request will be processed asynchronously. See EndEstablish(IAsyncResult) to complete this asynchronous operation.