Calculate speed per sec and time left of sending a file using sockets tcp c#

Question

How can I calculate the speed per sec, and the time left in sec? I\'ve tried to use:

void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e) {
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Answer 1

You can't fix that. The only way to 'fix' it is by creating a constant speed network/internet.

the network (and your computer) does not have a constant speed.

The calculation tells you what it is.