Hi Ravi
thanks for your reply.
if you take the server side certificate on web based scenario. we need to get certificate from any of the third parties. and install on the server and configure the IIS for "client side certificate required". and We need to configure the IE for sending client certificate on every request. Once its configure every HTTP request will be sent along with the Certificate and validated by the IIS.

But in case of WinForms. how do I implement the same?

Thanks
Sathiya