GreenTree.Maschinenbestellungen/GreenTree.Maschinenbestellungen.Core/Extension/StringExtension.cs

using System;
using System.Collections.Generic;
using System.Text;

namespace GreenTree.Maschinenbestellungen.Core.Extension
{
    public static class StringExtension
    {
        /// <summary>
        /// Évaluates a string between a starting and an endling string part
        /// </summary>
        /// <param name="str">Base string.</param>
        /// <param name="start">Beginning string part.</param>
        /// <param name="end">Ending string part.</param>
        public static string Between(this string str, string start, string end)
        {
            var startIndex = str.IndexOf(start) + start.Length;
            var endIndex = str.IndexOf(end, startIndex);

            return end == String.Empty 
                ? str.Substring(startIndex) 
                : str[startIndex..endIndex];
        }
    }
}