.NET Performance fine tuning tools

OPNET

There will be a lot of tools in the Market to identify the bottlenecks in the performance


out of the all the tools, the one i love very much in Opnet tool


OPNET delivers the industry’s most powerful integrated suite of Application Performance Management solutions for:
End-User Experience Monitoring
Application Component Monitoring
End-to-End Transaction Analysis
These solutions leverage best-in-class


It's very easy to use and configure

For more details http://www.opnet.com/index.html

ANTS Profiler

Speed up the performance of your application with ANTS Performance Profiler, for .NET code analysis.

ANTS Memory Profiler™ for locating memory leaks and investigating your application's memory usage

Exception Hunter™ for finding unhandled exceptions in .NET code

.NET Reflector® Pro for debugging third-party code in Visual Studio
For More details