如何在c#中获取存储在list<dynamic>中的委托的输入和返回类型？

using System;
using System.Collections.Generic;
using System.Reflection;

class Program
{
    static void Main()
    {
        List<dynamic> delegates = new List<dynamic>();
        delegates.Add(new Func<int, string>(TestMethod));

        foreach (var del in delegates)
        {
            Type delegateType = del.GetType();
            MethodInfo methodInfo = delegateType.GetMethod("Invoke");
            
            // 获取委托的输入参数类型
            ParameterInfo[] parameters = methodInfo.GetParameters();
            Console.WriteLine("输入参数类型：");
            foreach (var parameter in parameters)
            {
                Console.WriteLine(parameter.ParameterType);
            }
            
            // 获取委托的返回类型
            Type returnType = methodInfo.ReturnType;
            Console.WriteLine("返回类型：");
            Console.WriteLine(returnType);
        }
    }

    static string TestMethod(int input)
    {
        return input.ToString();
    }
}