Which things i should take care to develop high performance asp.net application.
The most important thing is to be sure to set
performance="11"
in your Web.config file, so that while other sites perform at 10, yours will perform one better.
Edit: Now that I've been voted up (seriously, guys?) into visibility, I feel like I should add something that's actually helpful. There are a bunch of good results for google searches on "asp.net performance." These two articles on MSDN are particularly helpful.
Check http://blog.whiletrue.com/2009/04/aspnet-mvc-performance/ and http://codeclimber.net.nz/archive/2009/04/17/the-performances-implications-of-the-expression-tree-based-actionlink-helper.aspx. I'm working too on a blog post about performances. Up to now just realized a simple bench tool using apache bench to compare client side rendering and server rendering using asp.net mvc and jQuery