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C# closure example

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Shows an example of what a closure is.

Result: Counter=1 Counter= 2

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  1. public class Test {
  2.  
  3.         static void Main() {
  4. 			Action action = Test.CreateAction();
  5.             action();
  6.             action();
  7.             Console.ReadLine();
  8.         }
  9.  
  10.         public static Action CreateAction() {
  11.             int counter = 0;
  12.             return delegate {
  13.                 // Yes, it could be done in one statement; 
  14.                 // but it is clearer like this.
  15.                 counter++;
  16.                 Console.WriteLine("counter={0}", counter);
  17.             };
  18.         }
  19.     }

URL: http://csharpindepth.com/articles/chapter5/closures.aspx

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