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

Answer 1

string.Format shortcut:

public static class StringExtensions
{
    // Enable quick and more natural string.Format calls
    public static string F(this string s, params object[] args)
    {
        return string.Format(s, args);
    }
}

Example:

var s = "The co-ordinate is ({0}, {1})".F(point.X, point.Y);

For quick copy-and-paste go here.

Don't you find it more natural to type "some string".F("param") instead of string.Format("some string", "param") ?

For a more readable name, try one of these suggestion:

s = "Hello {0} world {1}!".Fmt("Stack", "Overflow");
s = "Hello {0} world {1}!".FormatBy("Stack", "Overflow");
s = "Hello {0} world {1}!".FormatWith("Stack", "Overflow");
s = "Hello {0} world {1}!".Display("Stack", "Overflow");
s = "Hello {0} world {1}!".With("Stack", "Overflow");

..