In the web.config add the following lines to system.web.
<webServices>
<protocols>
<remove name="Documentation" />
</protocols>
</webServices>
If you want to allow certain types, use the “add” directive. Below lines
will allow GET and POST commands, but hides the operations.
<webServices>
<protocols>
<add name="HttpPost" />
<add name="HttpGet" />
<remove name="Documentation" />
</protocols>
</webServices>
That’s all.
