How KeepAlive HTTP header should look like in a sniffer?

I am trying to make Http connections made by C# HttpClient helper class reusable. I read that there is KeepAlive header which has to be present in Http request.

I sniffed the traffic and I cant find any reference to KeepAlive.

It has GET and it has HTTP/1.1 st开发者_C百科rings in there. No KeepAlive no nothing.

P.S. I also tried to find KeepAlive property somewhere on HttpClient but couldnt...

Any ideas?

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It should have a Connection header, which looks like this:

• Connection: Close
• Connection: Keep-Alive

The keep-alive header looks like this:

• Keep-Alive: 115