private async Task Initialise() { _voucherService = new VoucherService(); _voucherResponse = await _voucherService.GetVouchers(); var vouchersList = new List <string> { "Select Voucher" }; vouchersList.AddRange(_voucherResponse.Select(x => x.Description).ToList()); var spnVoucher = FindViewById <Spinner>(Resource.Id.spnVoucher); spnVoucher.ItemSelected += Voucher_OnSelected; var voucherAdapter = new ArrayAdapter <string>(this, Android.Resource.Layout.SimpleSpinnerItem, vouchersList); voucherAdapter.SetDropDownViewResource(Android.Resource.Layout.SimpleSpinnerDropDownItem); spnVoucher.Adapter = voucherAdapter; }