How to provide custom string placeholder for string format

Question

You might want to check out FormatWith 2.0 by James Newton-King. It allows you to use property names as formatting tokens such as this:

var user = new User()
{
    Name = "Olle Wobbla",
    Age = 25
};

Console.WriteLine("Your name is {Name} and your age is {Age}".FormatWith(user));

You can also use it with anonymous types.

UPDATE: There is also a similar solution by Scott Hanselman but it is implemented as a set of extension methods on Object instead of String.

UPDATE 2012: You can get Calrius Consulting’s NETFx String.FormatWith Extension Method NuGet package on NuGet.org

UPDATE 2014: There is also StringFormat.NET and littlebit’s StringFormat