C# Chat System

What I need is a Chat System wrote in C# (only C#). These apps is an standalone application. The server must have: 1 - Visual info of all users connected. 2 - Possibility to kick or ban user (if needed store banned users in a text or sqite file). 3 - server control (start/pause/stop). 4 - a log. 5 - possibility to send messages to a specific user or a broadcast message. 6 - an options form with the possibility to choose the server listening port and limit users on the server. 7 - choice to send to clients (room chat or private chat). This choice will be sent to each user on the client connection. the client must have: 1 - list of all users connected to the server. 2 - possibility to talk to any other user privately or in a chat room (server decides). 3 - an authentication form based on windows authentication domain. these apps must use threads and have full commented lines.