protected override void OnCreate(Bundle bundle) { base.OnCreate(bundle); // Set our view from the "main" layout resource SetContentView(Resource.Layout.Main); var button = FindViewById <Button>(Resource.Id.myButton); //if you leave server_Url empty - it will be assigned default - https://cloud.count.ly string server_Url = "http://try.count.ly"; // you can put '/' at the end. if you don't out it will be automaticly added. string app_key = "fa65c0e6a099bd4e3b4ac8368dac7542df76497a"; string device_id = "123"; var responseLabel = FindViewById <TextView>(Resource.Id.textViewResponse); Countly Service = Countly.Instance; Service.Init(server_Url, app_key, device_id); }