如何从另一种类型的T获取T的类型(ex:<ICollection<test11>>)

import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;
import java.util.Collection;

public class Main {
    public static void main(String[] args) {
        Collection<TestClass> collection = new ArrayList<>();
        Type type = collection.getClass().getGenericSuperclass();

        if (type instanceof ParameterizedType) {
            ParameterizedType parameterizedType = (ParameterizedType) type;
            Type[] typeArguments = parameterizedType.getActualTypeArguments();

            if (typeArguments.length > 0) {
                Type typeArgument = typeArguments[0];
                System.out.println(typeArgument.getTypeName());
            }
        }
    }
}

class TestClass {
    // ...
}

using System;
using System.Collections.Generic;

class Program
{
    static void Main(string[] args)
    {
        ICollection<TestClass> collection = new List<TestClass>();
        Type type = collection.GetType().GetGenericArguments()[0];

        Console.WriteLine(type.FullName);
    }
}

class TestClass
{
    // ...
}