练过的最复杂一个方法

using System;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Threading.Tasks;

using log4net.Appender;
using System.IO;
using log4net.Layout;
using System.Diagnostics;

[assembly: AssemblyVersion("1.0.2000.0")]

namespace T {

    public class B
    {
        public bool Test(string str)
        {
            if (str != null)
            {
                Console.WriteLine("Hello");
                return true;
            }
            return false;
        }
        public B()
        {

        }
    }
    class Program
    {
        public static bool Test(string str)
        {
            if (str != null)
            {
                Console.WriteLine("Hello");
                return true;
            }
            return false;
        }
        public static bool TestDele<B>(Func<B, bool> func)
        {

            // TResult t=default(TResult);
            //string t = default(string);
            //t =Convert.ToString("hello")
            B b = default(B);
            b = (B)GetBtype();
            func.Invoke(b);
            //  bool  b=func.Invoke()
            if (func != null)
            {
                return true;
            }
            return false;
        }

        private static object GetBtype()
        {
            B b = new B();
            return b;
        }

        static void Main(string[] args)
        {
            bool bb = TestDele<B>(item => item.Test("hello"));

            Console.Write(bb.ToString());
        }
    }
}