C# implementation of Ruby's tap method

TapExtension.cs

public static class TapExtension {
	public static T Tap<T>(this T obj, Action<T> block) {
		block.Invoke(obj);
		return obj;
	}
}

Usage.cs

var stringBuilderSmall = new StringBuilder().Tap(sb => sb.AppendLine("Inside the small tap"));
Console.WriteLine(stringBuilderSmall.ToString());

var stringBuilderBig = new StringBuilder().Tap(sb => {
	sb.AppendLine("Inside the big tap");
	sb.AppendLine("Still inside the big tap");
	sb.AppendLine("Yep, still inside the big tap");
});
Console.WriteLine(stringBuilderBig.ToString());