What are your favorite extension methods for C#? (codeplex.com/extensionoverflow)

Answer 1

The ThrowIfArgumentIsNull is a nice way to do that null check we all should do.

public static class Extensions
{
    public static void ThrowIfArgumentIsNull(this T obj, string parameterName) where T : class
    {
        if (obj == null) throw new ArgumentNullException(parameterName + " not allowed to be null");
    }
}

Below is the way to use it and it works on all classes in your namespace or wherever you use the namespace its within.

internal class Test
{
    public Test(string input1)
    {
        input1.ThrowIfArgumentIsNull("input1");
    }
}

It's ok to use this code on the CodePlex project.