如何查看哪个类作为参数传递给 Rider 中的模板？

Question

I am debugging C# templates in Rider a lot and would like to know whether or not it is possible and if yes, then how to see what class is coming into template in Rider?

Example:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            //Your code goes here
            Console.WriteLine("Hello, world!");
        }

        public void DoSomething<T>() {
            //What is a type of T?
        }
    }
}

Answer 1

With a fresh install and the default settings, you can see the variable type in the "Variables" window that you can see when you debug:

Answer 2

I think the previously marked answer is correct, but only for a specific case scenario.

If I understand the question correctly, it can be rephrased to "How to inspect the type of a generic parameter using Rider debugger?" If so @nvoigt's answer is correct in the sense that the debugger shows you the type of each variable in the scope of the breakpoint. Thus in the shown example:

public void DoSomething<T>(T arg)
{
    ...
}

The type of argument is easily readable in the Variables window:

However if the generic argument 'T' is not the type of the method argument 'arg' as in:

public T DoSomething<T>(string arg)
{
    ...
}

Then arg will be of type string as was defined. In that case you need to look at the Frames window - to the left ot Variables. There, on the first line you will be able to see the method where the execution is halted (by the breakpoint) and if you expand that window you will see something like:

Program.DoSomething<TypePassedAsGenericArgument>()

where TypePassedAsGenericArgument will be the full name of the type, aka - namespace + class name:

I think this clarification might help some new coders out there. Go get those BUGS!