@property - take it behind the woodshed and shoot it?

[Jacob Carlborg]

On 2013-01-25 16:05, mist wrote:

> Great, could you give a sample? Does it work on compile time or injects
> in run-time? Is calling of such methods allowed in usual free form?
>
> Unfortunately I have never been using C# in practice, only following
> materials available in the internet, would be really interesting to
> learn from their approach.

The secret is to add "this" in front of the argument type you want to 
the method to extend:

namespace ExtensionMethods
{
     public static class MyExtensions
     {
         public static int WordCount(this String str)
         {
             return str.Split(new char[] { ' ', '.', '?' },
                              StringSplitOptions.RemoveEmptyEntries).Length;
         }
     }
}

using ExtensionMethods;

string s = "Hello Extension Methods";
int i = s.WordCount();

http://msdn.microsoft.com/en-us/library/vstudio/bb383977.aspx

-- 
/Jacob Carlborg