C#匿名函数

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委托是一种包装方法调用的类型。就像类型一样，可以在方法之间传递委托实例，并且可以像方法一样调用委托实例。匿名函数是一个“内联”语句或表达式，可在需要委托类型的任何地方使用。可以使用匿名函数来初始化命名委托，或传递命名委托（而不是命名委托类型）作为方法参数。

Lambda 表达式可以绑定到表达式目录树，也可以绑定到委托。

示例:

class Test
{
delegate void TestDelegate(string s);
static void M(string s)
    {
        Console.WriteLine(s);
    }

static void Main(string[] args)
    {
// Original delegate syntax required 
// initialization with a named method.
        TestDelegate testdelA = new TestDelegate(M);

// C# 2.0: A delegate can be initialized with
// inline code, called an "anonymous method." This
// method takes a string as an input parameter.
        TestDelegate testDelB = delegate(string s) { Console.WriteLine(s); };

// C# 3.0. A delegate can be initialized with
// a lambda expression. The lambda also takes a string
// as an input parameter (x). The type of x is inferred by the compiler.
        TestDelegate testDelC = (x) => { Console.WriteLine(x); };

// Invoke the delegates.
        testdelA("Hello. My name is M and I write lines.");
        testDelB("That's nothing. I'm anonymous and ");
        testDelC("I'm a famous author.");

// Keep console window open in debug mode.
        Console.WriteLine("Press any key to exit.");
        Console.ReadKey();
    } 
}
/* Output:
    Hello. My name is M and I write lines.
    That's nothing. I'm anonymous and
    I'm a famous author.
    Press any key to exit.
*/