记关于 Lambda 表达式的基础写法

namespace MyLambda
{
public delegate void Action<in T1, in T2, in T3, in T4, in T5, in T6, in T7, in T8, in T9, in T10, in T11, in T12, in T13, in T14, in T15, in T16, in T17>(T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8, T9 arg9, T10 arg10, T11 arg11, T12 arg12, T13 arg13, T14 arg14, T15 arg15, T16 arg16, T17 arg17);
public delegate TResult Func<in T1, in T2, in T3, in T4, in T5, in T6, in T7, in T8, in T9, in T10, in T11, in T12, in T13, in T14, in T15, in T16, in T17, out TResult>(T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8, T9 arg9, T10 arg10, T11 arg11, T12 arg12, T13 arg13, T14 arg14, T15 arg15, T16 arg16, T17 arg17);
public delegate void NoReturnNoParaOut();

public class LambdaShow
{

public static void Show()
{
{
NoReturnWithPara method = new NoReturnWithPara(ShowStudent);//2 实例化委托 要求传递的方法必须和委托约束的签名一致
method.Invoke(196, "Emrys");//3 调用委托
}

{
NoReturnWithPara method = ShowStudent;//实例化委托的时候，可以去掉 new NoReturnWithPara
method.Invoke(196, "Emrys");
}

{
NoReturnWithPara method = delegate(int id, string name)//匿名方法
{
Console.WriteLine("id={0} name={1}正在高级班学习....", id, name);
};
method.Invoke(196, "Emrys");
}

{
NoReturnWithPara method = (int id, string name) =>//lambda表达式  本质是一个匿名函数，是一个函数
{
Console.WriteLine("id={0} name={1}正在高级班学习....", id, name);
};
method.Invoke(196, "Emrys");
}

{
NoReturnWithPara method = (id, name) =>//实例化委托 要求传递的方法必须和委托约束的签名一致   编译器会自动推断
{
Console.WriteLine("id={0} name={1}正在高级班学习....", id, name);
};
method.Invoke(196, "Emrys");
}

{
//如果方法体只有一行，可以去掉大括号
NoReturnWithPara method = (id, name) => Console.WriteLine("id={0} name={1}正在高级班学习....", id, name);
method.Invoke(196, "Emrys");
}

{
NoReturnNoPara method = () => { };
NoReturnWithOnePara method1 = i => Console.WriteLine(i);
method1.Invoke(13);

}
{
WithReturnWithPara method = (m, n) => { return DateTime.Now.Second; };
Console.WriteLine("当前时间的second={0}", method.Invoke(3, 4));
}
{
WithReturnWithPara method = (m, n) => DateTime.Now.Second;
Console.WriteLine("当前时间的second={0}", method.Invoke(3, 4));
}

{
//0 到16个参数  无返回值 的泛型委托
Action method = () => { };
Action<int> act1 = i => Console.WriteLine(i);
Action<string> act2 = i => Console.WriteLine(i);
Action<string, long, DateTime, string, int, decimal, byte, LambdaShow, long, DateTime, string, int, decimal, byte, LambdaShow, Program> act1111 = null;
Action<string, string, long, DateTime, string, int, decimal, byte, LambdaShow, long, DateTime, string, int, decimal, byte, LambdaShow, Program> act11111 = null;
}
{
//0 到16个参数  带返回值 的泛型委托
Func<string> func1 = () => "‭‭‭‭‭‭‭‭Menzer";
Console.WriteLine(func1.Invoke());
Func<string, string, long, DateTime, string, int, decimal, byte, LambdaShow, long, DateTime, string, int, decimal, byte, LambdaShow, Program> func1111 = null;
Func<string, string, string, long, DateTime, string, int, decimal, byte, LambdaShow, long, DateTime, string, int, decimal, byte, LambdaShow, Program> func11112 = null;
}

}

public delegate void NoReturnNoPara();//1 声明委托
public delegate void NoReturnWithOnePara(int id);
public delegate void NoReturnWithOnePara1(string id);
public delegate void NoReturnWithOnePara2(long id);
public delegate void NoReturnWithOnePara3(DateTime id);
public delegate void NoReturnWithPara(int id, string name);
public delegate int WithReturnNoPara();
public delegate int WithReturnWithPara(int x, int y);

private static void ShowStudent(int id, string name)
{
Console.WriteLine("id={0} name={1}正在高级班学习....", id, name);
}
private static void ShowStudent1(int id, string name)
{
Console.WriteLine("id={0} name={1}正在高级班学习....", id, name);
}
private static void ShowStudent2(int id, string name)
{
Console.WriteLine("id={0} name={1}正在高级班学习....", id, name);
}
private static void ShowStudent3(int id, string name)
{
Console.WriteLine("id={0} name={1}正在高级班学习....", id, name);
}
}
}