title: Add unit test case to test external webservice (.asmx) .NET
body: <p>I have made a code to read the external web service and find the expose methods and their parameters using <code>System.Web.Services.ServiceDescription</code>. 
  I am also able to invoke the method and get the output through webservice.
  This is done only on the bases of external Web service Url.</p>
  
  <p>Everything is done from CodeBehind (C#).</p>
  
  <p>I need to add the unit test case to test the functionality by adding dummy .asmx webservice which will be accessed by unit test.</p>
  
  <p>Please let me know or have suggestion to how can i create a dummy service on the fly and used.</p>