2.1.3.1.1.1 Sending Request
HTTP request MUST be constructed as specified in [SOAP1.1] section 6 with the following additional constraints:
The Request-URI of the HTTP request message MUST be set to the Server Object URI of the Remote Method.
The User-Agent SHOULD contain the string "MS .NET Remoting".<14>
The charset of the Content-Type SHOULD be UTF-8.