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I am Microsoft C# MVP July - 2012 My name is Pranay Rana. Currently, I'm working as senior software engineer in a mid-sized company (Ahmedabad). I have 5 years of the experience in web development with Asp.Net, C# and MS SQL server. For me, the definition of programming is: something that you do once and that gets used by multiple users for many years Pranay is a DZone MVB and is not an employee of DZone and has posted 34 posts at DZone. You can read more from them at their website. View Full User Profile

Extend The Array Class with Extension Methods

05.27.2012
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Here I am going to discuss how you can create the Extension method for the System.Array Class. On MSDN : Array Class - Provides methods for creating, manipulating, searching, and sorting arrays, thereby serving as the base class for all arrays in the common language runtime
public static class ArryaExtension
    {
        public static float Average(this System.Array arr)
        {
            int[] a =  arr.Cast<int>().ToArray();
            return (float)a.Sum()/arr.Length;
        }
    }
</int>
Note - in example below I use type int but this can be replace by any type you want.
In following Example I have implemented Average method for the array elements of type int.To get this extension method work you need to pass the type in type as System.Array. Next I converted the array element to type I want this help me to get the support of IEnumerableinterface methods because System.Array is base class which doesn't implement IEnumerable. So once it get convert to specific type array I can able to access IEnumerable methods like Sum which makes task easy.

Conclusion
You can replace the code in the method for any other type and extend the System.Array class easily as per you requirement.
Published at DZone with permission of Pranay Rana, author and DZone MVB. (source)

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