委托的4种写法

委托1：

using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplicartion2
{
    public delegate void G();//定义一个委托
    public partial class Form1 : Form
    {

        public static void Main(string[] args)//调用方法
        {
            G g = new G(W);
            g();
            Console.ReadKey();
        }
        private static void W()//写了一个方法
        {
            Console.Write("你好");
        }
    }
}

带参数的委托
namespace WindowsFormsApplicartion2
{
    public delegate void G(string a,string b);
    public partial class Form1 : Form
    {

        public static void Main(string[] args)
        {
            G g = new G(W);
            g("你好","再见");
            Console.ReadKey();
        }
        private static void W(string a,string b)//方法
        {
            Console.Write(a+b);
        }
    }
}



另一个写法
namespace WindowsFormsApplicartion2
{
    public delegate void G(string a,string b);
    public partial class Form1 : Form
    {

        public static void Main(string[] args)
        {
            G g = new G(delegate {
                Console.WriteLine("你好");
            
            });
           
        }

另一方法的带参数的委托

namespace WindowsFormsApplicartion2
{
    public delegate void G(string a,string b);
    public partial class Form1 : Form
    {

        public static void Main(string[] args)
        {
            G g = new G(delegate(string a, string b) { Console.WriteLine(a + b); });
            g("你好","再见");
            Console.ReadLine();
            //g("你好","再见");
            //Console.ReadKey();
        }