Enabling HttpGet and HttpPost for web services

If your web application needs to accept incoming webservice method requests based on the GET and POST protocols then add the following lines to your web.config file.

<configuration>
  <system.web>
    <webServices>
      <protocols>
        <add name="HttpGet"/>
        <add name="HttpPost"/>
      </protocols>
    </webServices>
  </system.web>
</configuration>