How to create and invoke WebServices in Unity3D?

How to invoke the WebServices and collect the values returned from that WebService? I did a lot of research but could not find any workaround.I am sorry if this is a silly question to be asked here.Since,I am new to Unity and WebServices in particular,I am expecting a help from the community.

Thank you.

There is actually two part for your question:

  1. How to create a webservice
  2. How to consume it in Unity

The first one is a wide topic by itself, depending on the language you’re using for it, the hosting, etc.
The second is a bit more easy.

Have you looked at http://wiki.unity3d.com/index.php/Webservices_In_Unity ? It covers the basics of both topics.