c# delegates
http://tutorials.csharp-online.net/index.php?title=CSharp_Delegates_and_Events http://tutorials.csharp-online.net/index.php?title=Delegate http://en.wikibooks.org/wiki/C_Sharp_Programming/Delegates_and_Events http://www.csharp-station.com/Tutorials/Lesson14.aspx http://msdn.microsoft.com/en-us/library/sx2bwtw7.aspx http://www.c-sharpcorner.com/uploadfile/Ashush/delegates-in-C-Sharp/ http://msdn.microsoft.com/en-us/library/aa288459(v=vs.71).aspx http://www.hanselman.com/blog/