Chain Extension Methods in .NET

Extension methods enable you to add methods to existing types without creating a new derived type, recompiling, or otherwise modifying the original type. You can even chain Extension Methods.

Here’s an example:

class Program
{
    static void Main(string[] args)
    {
        decimal num = 233.53468M;
        // chaining extension methods
        decimal result = num.DoSquare().DoRound();
        Console.WriteLine(result);
        Console.ReadLine();
    }
}


public static class MathEasy
{
    public static decimal DoSquare(this decimal i)        {
        // square a number
        return i * i;
    }
    public static decimal DoRound(this decimal d)        {
        // Round to three decimal places
        return Math.Round(d, 3);
    }
}

As you can see, we are chaining extension methods

decimal result = num.DoSquare().DoRound();

OUTPUT

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About The Author

Suprotim Agarwal, ASP.NET Architecture MVP works as an Architect Consultant and provides consultancy on how to design and develop Web applications.

Suprotim is also the founder and primary contributor to DevCurry, DotNetCurry and SQLServerCurry. He has also written an EBook 51 Recipes using jQuery with ASP.NET Controls.

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