C＃客户端 - 服务器协议/模型问题

I am trying to conceptually work through a model for a client-server socket application I am writing in c# (both client and server). My server will need to handle many clients at once, and preferably multiple requests from a client at once. I have worked out a container for my communication where I will send a fixed length header at the beginning of each message which will contain (among other things) the length of the message. I have some experience with socket programming in c#, so I am comfortable using Asynchronous sockets. I am trying to conceptually work through a mode