匿名方法和匿名对象

// Declare a delegate.
delegate void Printer(string s);

class TestClass
{
    static void Main()
    {
        // Instatiate the delegate type using an anonymous method.
        Printer p = delegate(string j)
        {
            System.Console.WriteLine(j);
        };

        // Results from the anonymous delegate call.
        p("The delegate using the anonymous method is called.");

        // The delegate instantiation using a named method "DoWork".
        p = new Printer(TestClass.DoWork);

        // Results from the old style delegate call.
        p("The delegate using the named method is called.");
    }

    // The method associated with the named delegate.
    static void DoWork(string k)
    {
        System.Console.WriteLine(k);
    }
}
/* Output:
    The delegate using the anonymous method is called.
    The delegate using the named method is called.
*/

 

匿名对象

 

而在C# 3.0中，我们无须为这些无关紧要的类型浪费时间。通过使用“匿名类型”，只要在需要一个这样的对象时使用没有类型名字的new表达式。var b1 = new { Name = "The First Sample Book", Price = 88.0f };  

var b2 = new { Price = 25.0f, Name = "The Second Sample Book" };
var b3 = new { Name = "The Third Sample Book", Price = 35.00f };

Console.WriteLine(b1.GetType());
Console.WriteLine(b2.GetType());
Console.WriteLine(b3.GetType());