Answer by unity_Uxrdlqpo2JUXMA

///

/// Replaces the first occurrence. ///

/// The source. /// The find. /// The replace. /// public static string ReplaceFirstOccurrence(string Source, string Find, string Replace) { int Place = Source.IndexOf(Find); string result = Source.Remove(Place, Find.Length).Insert(Place, Replace); return result; } ///

/// Replaces the last occurrence. ///

/// The source. /// The find. /// The replace. /// public static string ReplaceLastOccurrence(string Source, string Find, string Replace) { int Place = Source.LastIndexOf(Find); string result = Source.Remove(Place, Find.Length).Insert(Place, Replace); return result; }