jellyfin/Emby.Naming/Extensions/StringExtensions.cs

using System;
using System.Text;

namespace Emby.Naming.Extensions
{
    public static class StringExtensions
    {
        public static string Replace(this string str, string oldValue, string newValue, StringComparison comparison)
        {
            var sb = new StringBuilder();

            var previousIndex = 0;
            var index = str.IndexOf(oldValue, comparison);

            while (index != -1)
            {
                sb.Append(str.Substring(previousIndex, index - previousIndex));
                sb.Append(newValue);
                index += oldValue.Length;

                previousIndex = index;
                index = str.IndexOf(oldValue, index, comparison);
            }

            sb.Append(str.Substring(previousIndex));

            return sb.ToString();
        }
    }
}