private async void btnSendCode_Click(object sender, EventArgs e)
{
NumberToSendMessage = tbPhoneNumber.Text;
if (string.IsNullOrWhiteSpace(NumberToSendMessage))
{
return;
}
// this is because the contacts in the address come without the "+" prefix
var normalizedNumber = NumberToSendMessage.StartsWith("+") ?
NumberToSendMessage.Substring(1, NumberToSendMessage.Length - 1) :
NumberToSendMessage;
client = NewClient();
await client.ConnectAsync();
hash = await client.SendCodeRequestAsync(normalizedNumber);
tbPhoneNumber.Enabled = false;
btnSendCode.Enabled = false;
tbVerficationCode.Enabled = true;
btnLoginNew.Enabled = true;
}