>i think it is better to rewrite some using Generics and extension methods
>
>Here's what I have so far
>

>Console.WriteLine(" {0} ", "AB".ChrTran("AB", "BC"));
>

>
>

>// string
>namespace GregoryAdam.Base.ExtensionMethods
>{
>	public static partial class ExtensionMethods
>	{
>		public static string ChrTran(this string s, string from, string to)
>		{
>			var sb = new StringBuilder(s, s.Length);
>
>			int i, j;
>
>			for( i = -1; ++i < sb.Length;  )
>			{
>				if ((j = from.IndexOf(sb[i])) >= 0)
>				{
>					if (j < to.Length)
>					{
>						sb[i] = to[j];
>					}
>					else
>					{
>						sb.Remove(i--, 1);
>					}
>				}
>			}
>
>			return sb.ToString();
>		}
>
>	}
>}
>

>
>Below
>
> - Inlist() should work with any type that implements IEquatable«T»
>- Between should work with any type that implements IComparable«T»
>
>Note:
>- change « into LessThanSign
>- change » into GreaterThanSign
>
>

>// Generic
>namespace GregoryAdam.Base.ExtensionMethods
>{
>
>	public static partial class ExtensionMethods
>	{
>		#region InList
>		public static bool InList<T>(this T s, params T[] list) where T : IEquatable«T»
>		{
>			return list.Contains(s);
>		}
>
>
>
>		#endregion
>		//--------------------------------------------------------------------------------
>		#region Between
>		public static bool Between<T>(this T s, T s1, T s2) where T : IComparable«T»
>		{
>			return (s.CompareTo(s1) >= 0) && (s.CompareTo(s2) <= 0);
>
>		}
>#if false
>		// 3 times slower
>		public static bool Between(this IComparable s, IComparable s1, IComparable s2)
>		{
>			return (s.CompareTo(s1) >= 0) && (s.CompareTo(s2) <= 0);
>		}
>#endif
>		#endregion
>		//--------------------------------------------------------------------------------
>
>	}
>}
>

>
>
>

Once you have this class, how do you use it?