I want Event Calendar to be developed in ASP.NET .

This tutorial can be helpful: http://blog.scheduler-net.com/post/2012/04/03/simple-event-calendar-asp-net.aspx

I will suggest use jquery fullcalendar.Its open source and well documented and you can easily inegrate with server side if want some kind of database operation.

Useful links:

• arshaw.com/fullcalendar/
  
• https://code.google.com/p/fullcalendar-asp-net/

just remember one thing everything is easy but you have to pay for that.