[Release - C#] Streamlined GetStringBetween and GetAllStringBetween

[Chris]

 using System;
using System.Collections.Generic;
 
public static class StringExtensions
{
    public static List<String> GetAllStringsBetween(this String Input, String Start, String End)
    {
        List<String> Return = new List<String>();
        Int32 Result = 0;
        Int32 LResult = 0;
        while ((Result = Input.GetOffsetBetween(Start, End, Result)) != -1)
        {
            Return.Add(Input.GetStringBetween(Start, End, LResult));
            LResult = Result;
        }
        return Return;
    }
 
    public static String GetStringBetween(this String Input, String Start, String End)
    {
        return Input.GetStringBetween(Start, End, 0);
    }
 
    public static String GetStringBetween(this String Input, String Start, String End, Int32 Offset)
    {
        if (Offset < Input.Length)
        {
            Int32 StartPos = (Input.IndexOf(Start, Offset) + Start.Length);
            if (StartPos > -1)
            {
                Int32 EndPos = Input.IndexOf(End, StartPos);
                if (EndPos > -1)
                {
                    return Input.Substring(StartPos, (EndPos - StartPos));
                }
            }
        }
        return String.Empty;
    }
 
    private static Int32 GetOffsetBetween(this String Input, String Start, String End, Int32 Offset)
    {
        if (Offset < Input.Length)
        {
            Int32 StartPos = Input.IndexOf(Start, Offset);
            if (StartPos > -1)
            {
                Int32 EndPos = Input.IndexOf(End, (StartPos + Start.Length));
                if (EndPos > -1)
                {
                    return EndPos;
                }
            }
        }
        return -1;
    }
} 
  

Extends the string class.

Example usage;
String test = "test";
String result = test.GetStringBetween("t", "t");

result == "es"