The new language feature of extension methods in C# 3.0, however, makes the latter code possible. This approach requires a static class and a static method, as follows:
in C# 3.0 you can configure the Util.Reverse() function to make the first code doable, so consider the following code of Util.
public static class Util
Line 32:
}
}
as you can see it is a simple static class, with one static function called Reverse, all what we have to do
# Make sure that the class is static
# Add this keyword before the type of the argument you want to extend.
