[OperationContract(AsyncPattern = true, Action = "http://schemas.microsoft.com/sqlserver/2005/06/30/reporting/reportingservices/DisableDataSource", ReplyAction = "*")]
IAsyncResult BeginDisableDataSource(DisableDataSourceRequest request, AsyncCallback callback, object asyncState)
<OperationContract(AsyncPattern:=True, Action:="http://schemas.microsoft.com/sqlserver/2005/06/30/reporting/reportingservices/DisableDataSource", ReplyAction:="*")>
Function BeginDisableDataSource(request As DisableDataSourceRequest, callback As AsyncCallback, asyncState As Object) As IAsyncResult