prompt a message or in label during single thread operation.

Hi,

I am using Mutex for getting single threaded environment.

Now i want something that when another request 'll be greated and performing same operation then first (browser's) request will be served and others will be in wait.

Now what i want to do ?

i just want to generate a message for other request that "Please hold on while first request is being server."

See my tried code please.
private static Mutex mut = new Mutex(); mut.WaitOne(); DoWork(); Thread.Sleep(500); mut.ReleaseMutex();