Anonymous Methods Vs Named Methods

create a console application in c#.net and copy this

namespace ConsoleApplication1
{
class Program
{
//Declaring a delegate
delegate void Display(String text);

static void Main(string[] args)
{
//Anonymous method
Display d = delegate(String s)
{
Console.WriteLine(s + "Anonymous method");
};

//Calling anonymous method
d("I am calling ");

d = new Display(Program.Foo);

//Calling named method
d("I am calling ");

Console.ReadLine();
}

/// Named method
public static void Foo(String text)
{
Console.WriteLine(text + "Named Method.");
}
}
}

You cannot use a "ref" or "out" variable inside an anonymous method.
If you are using a variable that is declared outside the anonymous method is called "outer" or "captured" variables of the anonymous method.

eg:-
string outside = "I am captured";
//Anonymous method
Display d = delegate(String s)
{
Console.WriteLine(s + "Anonymous method " + outside);
};