Testing code performance with the .NET StopWatch object

[Visisthebest]

I am currently trying to measure Visio VSTO addin code performance with the .NET StopWatch object. I notice the amount of (milli)seconds measured can be way off, in certain tests many more seconds elapsing than what is measured by the StopWatch. Is there a more accurate way to measure Visio VSTO addin code performance?

[Nikolay]

Performance Profiler maybe? 

Debug => Performance Profiler
https://docs.microsoft.com/en-us/visualstudio/profiling

[Visisthebest]

Yes Nikolay thank you you're right still so used to the bare bones VBA IDE that I forget VStudio has all these great functionalities!

.net lists also so much handier than collections.