Can you tell us more details Do you want to make a HTTP connection to port 80 Do you want to send a SOAP message or do you want to make a simple HTTP POST request with the XML as the HTTP request body
If you simply want to make a HTTP request and send the XML then with .NET there is not really much XML specific to the solution, look into System.Net.WebRequest/System.Net.HttpWebRequest and the corresponding WebResponse/HttpWebResponse.