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After sending some tcp data with the blocking/non-blocking methods such as:
Socket.Send() or Socket.SendAsync()
How can I know that my data has received an ACK message?
Can .NET know if TCP data has been successfully sent?
The only way to know for sure is to implement some kind of application-level acknowledgement. The TCP level “ACK” packet is not exposed to the application level at all, so you have to use something more than that.