More Server - An Echo Server Concurrent

Mission:

To design and program two programs one to be a server that is concurrent i.e. can take serveral client even at the same time and then reuse of the client
Again NO RAZOR PAGE-application.

Background:

The simple echo server from previous exercise Simple Server

For programming en iterative server (concurrent) in C# Console Application (.Net 5)

• (Reference) Task: https://msdn.microsoft.com/en-us/library/system.threading.tasks.task(v=vs.110).aspx
• (General) Doc for Task: https://docs.microsoft.com/en-us/dotnet/standard/parallel-programming/task-based-asynchronous-programming
• (Reference) Delegates: https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/delegates/
   
• Per Laursen Note : delegates p. 214-216
• Per Laursen Note : Task p.244-249

Assignment A: Refactor Your Echo Server to handle more than one client

1. In previous exercise you have implemented a simple Echo server, that takes one connection, handle the client and then close down.
    
2. Now insert a loop to handle several clients i.e. make a while(true) loop after the TcpListener has been started and before you accept the incomming TcpClient.
    
3. In the loop call the DoClient method from assignment B in the SimpleServer exercise
    
4. Try your refactored server with SocketTest - can you start more client consecutive ?
    
5. Optional: Commit and push your server-solution to a Git-Repository.

Assignment B: Refactor Your Server To Handle more client in parallel

1. Refactor your server so all the client will be handled simultaneously.
    
2. Instead of calling the DoClient directly make a Task which runs the DoClient method. The call should be like:
   
   Task.Run(() =>
   {
      TcpClient tempSocket = socket;
      DoClient(tempSocket);
   });
   
   .
3. Try your refactored server with SocketTest. Start two versions of SocketTest - can you call the server at the same time (nearly the same time)?
   To see a difference insert the code line Thread.Sleep(5000); in the DoClient before returning the echoLine.
    
4. Optional: Commit your project.