1. UInt32[] to String var val = client.ReadNode<UInt32[]>(nodename); strVal = String.Join(",", val); UInt32[] to String ex) UInt32[] Val = {1,2,3,4,5} strVal = 1,2,3,4,5 2. String to Int[] string numbersAsString = "1 2 3 4 5"; string[] numberStrings = numbersAsString.Split(' '); int[] numbers = Array.ConvertAll(numberStrings, int.Parse);