一、我们先看下C#代码下Lamdba表达式的写法
// <summary>
/// 写入日志委托
/// </summary>
/// <param name="message">消息</param>
delegate void WriteLog(string message);
class Program
{
static void Main(string[] args)
{
{
WriteLog method = (message) => { Console.WriteLine(message); };
method.Invoke("写入日志测试1");
}
{
WriteLog method = (message) => { Console.WriteLine(message); };
method.Invoke("写入日志测试2");
}
Console.ReadKey();
}
}
二、再通过反编译工具查看
internal class Program
{
[CompilerGenerated]
[Serializable]
private sealed class <>c
{
public static readonly Program.<>c <>9 = new Program.<>c(); public static WriteLog <>9__0_0; public static WriteLog <>9__0_1; internal void <Main>b__0_0(string message)
{
Console.WriteLine(message);
} internal void <Main>b__0_1(string message)
{
Console.WriteLine(message);
}
} private static void Main(string[] args)
{
WriteLog arg_21_0;
if ((arg_21_0 = Program.<>c.<>9__0_0) == null)
{
arg_21_0 = (Program.<>c.<>9__0_0 = new WriteLog(Program.<>c.<>9.<Main>b__0_0));
}
WriteLog writeLog = arg_21_0;
writeLog("写入日志测试1");
WriteLog arg_4F_0;
if ((arg_4F_0 = Program.<>c.<>9__0_1) == null)
{
arg_4F_0 = (Program.<>c.<>9__0_1 = new WriteLog(Program.<>c.<>9.<Main>b__0_1));
}
WriteLog writeLog2 = arg_4F_0;
writeLog2("写入日志测试2");
Console.ReadKey();
}
}
三、下面我们来看一组对比图，就非常容易的看出来了
由此我们得出的结论：编译器将lambda表达式生成一个类种类，每个lamdda也会生成一个独立的方法，然后绑定到委托的实例，所谓的lamdba表达式其实只是一个“语法糖”。