How can I debug the source code of .Net Core or the Base class libraries (coreFx)?

Question

I am using .NET Core 1.0 and Visual Studio 2015 Update 3 to make a simple Asp.Net Core MVC website.

How can I debug my application and \"Step

Answer 1

Also make sure that on a solution level, you have your project "configration", set to debug. See screenshot.
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(For the solution properties to show up, right click on the .sln in the solution explorer.)