http - Using HttpWebRequest, Keep-alive not working for many similar requests to localhost -

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i'm using httpwebrequest send many sync requests same http url on localhost, , need re-use tcp connections prevent ephemeral port depletion.

but don't seem able keep-alive working.

here's code make http request:

var request = (httpwebrequest) webrequest.create(url); httpwebresponse response = null;  request.method = "get"; request.keepalive = true;  try {     response = (httpwebresponse) request.getresponse();     // ... } catch (exception e) {     // ... } {     if (response != null)     {         response.close();     } }

i call above code many times in loop. requests successful, , return ok status code (200), running netstat -ano reveals there many many connections in time_wait state, expect re-use single connection.

i tried calling both iis express server on localhost (default asp.net mvc application) , weblogic application, same result.

i tried httpclient .net 4.5.

this results in running out of ephemeral ports.

is there wrong i'm doing? how can make .net re-use tcp connections?

try response.dispose(); instead of response.close();


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