using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks; namespace Fietsclient { class KettlerBikeComm { private static KettlerBikeComm _instance; public static KettlerBikeComm Instance { get { return _instance ?? (_instance = new KettlerBikeComm()); } } private KettlerBikeComm() { } } }