How to test for a broken connection of TCPClient after being connected?

Question

I\'ve been fighting with one problem for a whole 3 days I can\'t find any solution, please help :)
I work with Visual Studio 2010 and C# language.

I have a devic

Answer 1

it will be correct and working if you type the following:

byte[] tmp = new byte[] {0};
...             
client.Send(tmp, 1, 0);
...