Develop Instant Message server and client on Windows

To develop server and client program for an Instant Message network on Windows. Both the server and client will be delivered as VS 2010 C# solution. They will be able to run on the latest Windows server and client hardware (e.g. Windows server 2008 R2 SP1 and Windows 7) respectively. Only high-quality work will be accepted. ## Deliverables **Requirements include:** -- This project will include functionality normally expected from an IM network, including but not limited to * creation and login of users, * searching, adding and removing contacts, * send and receive message * send and receive file * send and receive data * administration of users and administration UI -- The following are out of the scope of this project: * video and voice communication, * communication with other public IM, social networks -- The structure of both IM server and client program must be optimally designed and implemented, to make them easy to maintain and upgrade. -- The IM server should be able to handle a large number of users -- The IM client must have a well designed API so other .NET projects can easily use it -- Communication between the IM server and client must be secure -- The code must be properly re-factored -- The work must be well documented -- The code must be compiled and run in C# NET 4.0/Visual Studio 2010 -- Deployment of the server will be part of this project -- The work must be high-quality and production-ready **Deliverables:** -- Preferably in 2 phases, with high-level design for phase 1 and implementation for phase 2; -- Completed C# source code for the IM server and client; -- Documentation for both server and client, including client API references; -- References to all other third packages used in either IM server or client. -- A separate C# testing UI project to test the work; **To Bid** Please give examples of your related previous work. I've posted a deadline of 35 days. If you feel that is too short, please post your timeframe with your bid. Please also state if the 2 phase delivery is ok.