using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace BlubbFish.Utils.IoT { static class Helper { internal static String ToUpperLower(this String s) { if (s.Length == 0) { return ""; } if (s.Length == 1) { return s.ToUpper(); } return s[0].ToString().ToUpper() + s.Substring(1).ToLower(); } } }