c#隐藏函数 lambda表达式泛型综合使用代码

偏执的太偏执、 2022-06-14 07:44 151阅读 0赞

using System;  
using System.Collections.Generic;  
using System.Linq;  
using System.Text;  
using System.Threading.Tasks;  
  
namespace NimingHanshu  
\{  
    class Program  
    \{  
        delegate void TestDelegate(string s);  
        delegate int del(int i);  
        //TResult 是返回值，Targ0是参数值  
        delegate TResult Func<Targ0, TResult>(Targ0 arg0);  
        static void M(string s)  
        \{  
            Console.WriteLine(s);  
        \}  
        static void Main(string\[\] args)  
        \{  
            //DelegateHistory();  
            //StartTread();  
  
  
            Console.ReadLine();  
        \}  
  
        private static void DelegateHistory()  
        \{  
            TestDelegate testDelA = new TestDelegate(M);  
            //C\#2.0 匿名函数  
            TestDelegate testDelB = delegate(string s) \{ Console.WriteLine(s); \};  
            //C\#3.0 Lambda表达式  
            TestDelegate testDelC = (x) => \{ Console.WriteLine(x); \};  
  
            testDelA("this is a deletegate");  
            testDelB("this is a anonymous method");  
            testDelC("this is a lambda expression");  
        \}  
  
        //匿名方法的使用范例  
        //匿名方法不能使用 ref out 作为参数列表  
        private static void StartTread()  
        \{  
            System.Threading.Thread t1 = new System.Threading.Thread  
            (  
               delegate()  
               \{  
                   Console.WriteLine("Hello ");  
                   Console.WriteLine(" World");  
               \}  
            );  
            t1.Start();  
        \}  
  
        //Lambda表达式  
        //语法要求 ()=>expression  
        private static void Lambda()  
        \{  
            del mydel = x => x \* x;  
            Console.WriteLine(mydel(5));  
  
            Func<int, bool> myFunc = x => x == 5;  
            Console.WriteLine(myFunc);  
        \}  
  
    \}  
\}