This documentation is archived and is not being maintained.

Peer.InviteAsyncCancel Method

Cancels the invitation that was sent with the InviteAsync method.

Namespace:  System.Net.PeerToPeer.Collaboration
Assembly:  System.Net (in System.Net.dll)

public void InviteAsyncCancel(
	Object userToken


Type: System.Object
User defined object to pass to the callback of the InviteAsync operation for identification. This required parameter must be unique across all asynchronous invitation operations in progress.


The userToken parameter cannot be null.


An asynchronous invitation is not outstanding.

Calling this method guarantees the system will cease to wait for a PeerInvitationResponse from the peer associated with the InviteAsync request.

Multiple invitations may be outstanding at any given time. If the InviteAsyncCancel method is called when an asynchronous operation identified by the userToken is not in existence, an exception is thrown. The userToken object must be provided since it is used to track a specific asynchronous call. This host application-supplied object is unique for each invite request.

When this method is used, the InviteCompleted event can still be raised, but the Cancelled property on the associated InviteCompletedEventArgs object will be set to true.

Calling this method requires a PermissionState of Unrestricted.

.NET Framework

Supported in: 4, 3.5

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.