匿名関数のいきさつを理解するコードがあります

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();

    }

}