StringExtensions is a static class (module) containing extension-methods for System.String class.

StringExtensions.cs

using System;
using System.Globalization;

namespace Helpers
{
    public static class StringExtensions
    {
        public static bool IsInt16(this string s)
        {
            Int16 result; return Int16.TryParse(s, out result);
        }

        public static bool IsInt32(this string s)
        {
            Int32 result; return Int32.TryParse(s, out result);
        }

        public static byte[] ToBytes(this string s)
        {
            byte[] bytes = new byte[s.Length * sizeof(char)];
            Buffer.BlockCopy(s.ToCharArray(), 0, bytes, 0, bytes.Length);
            return bytes;
        }

        public static string ToTitleCase(this string s)
        {
            return CultureInfo.CurrentCulture.TextInfo.ToTitleCase(s.ToLower());
        }
    }
}