The Coverage profiler tells you which routines and source code lines of your application were called during the run and which were not. This information can also be found with the Performance profiler, by checking the Hit Count column. Coverage is simply a faster and clearer way of focusing on what sections of code were executed and what were not. This tutorial demonstrates how you can use the Coverage profiler to analyze your applications.
See Also
Coverage Profiler
AQTime Samples and Tutorials
Profiling .NET Applications - Specifics