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I need an experienced C# developer, to developed a TCP server application with a highly scalable and high performance server that can handle at least 5-10 thousand concurrent connections: getting -raw byte- data via GPRS from GPS devices. A common communication process should look like this: - GPS device initiates a connection to my server - device send GPS data - my server answers if I want to get data - my server sends report to the device about getting it (like checksum) - getting new data from GPS, reportm and this happens again and again later GPS DEVICE closes the connection So, in my server I need - trace connected/active clients - to close any client from server side - catch the event, when a device closes the connection - get byte data - send data to clients