testing performance of a website

We have made a .net C# applications and want to test the performance.

What are good tools to test performance ? Something to record the flow through the application and can play it later again something like a stress tool

And what are the best options to debug the application for performance ? So that we can see how long a class/method runs and how many times the method will be hit.

In PHP we use cachegrind and xdebug but what are the options for .net ?

What is website performance analysis?

What Is Web Performance Monitoring? Web Performance Monitoring is the practice of analyzing and monitoring websites to make sure they display the most important content as quickly as possible, load their pages at consistent speeds, and don't suffer unexpected downtimes.

Visual Studio has web and load testing capabilities. You may also take a look at JMeter which is free.