Padding with string instead of char literal

PadRightExtension.cs

public static class Extensions
{
	public static string PadRight(this string input, int totalWidth, string paddingString){
		var rep = string.Concat(Enumerable.Repeat(paddingString, totalWidth-input.Length));
		return (input + rep);
	}
	public static string PadLeft(this string input, int totalWidth, string paddingString){
		var rep = string.Concat(Enumerable.Repeat(paddingString, totalWidth-input.Length));
		return (rep + input);
	}
}