Collection of extension methods for working with strings in .NET

StringExtensionMethods.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
namespace net.datacowboy
{
	public static class StringExtensionMethods
	{
		/// <summary>
		/// Remove non-digit characters from a string
		/// </summary>
		public static string StripNonDigitCharacters(this string input)
		{
			Regex re = new Regex(@"\D");
			return re.Replace(input, String.Empty);
		}


		/// <summary>
		/// Test if string matches a regular expression pattern
		/// </summary>
		public static bool IsRegularExpressionMatch(this string input, string regularExpressionPattern)
		{
			return input.IsRegularExpressionMatch(new Regex(regularExpressionPattern));
		}


		/// <summary>
		/// Test if string matches a regular expression
		/// </summary>
		public static bool IsRegularExpressionMatch(this string input, Regex regExp)
		{
			return regExp.IsMatch(input);
		}

		/// <summary>
		/// Test if string length within given range
		/// </summary>
		public static bool IsLengthWithinRange(this string input, int min, int max)
		{
			return (input.Length >= min && input.Length <= max);
		}

	}
}