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