protected override void OnCreate(Bundle savedInstanceState) { base.OnCreate(savedInstanceState); SetContentView(Resource.Layout.EmailVerificationLayout); EmailVerification(); //string Sentotp = Intent.GetStringExtra("otp");//receiving otp from previous activity //string username = Intent.GetStringExtra("username");//receiving username from previous activity //EditText txtreceivedOtp = FindViewById<EditText>(Resource.Id.txtOtp); Button btnVerification = FindViewById <Button>(Resource.Id.btnVerify); Button btnResendMail = FindViewById <Button>(Resource.Id.btnResendMail); EditText editEmail = FindViewById <EditText>(Resource.Id.txtEmail); editEmail.Text = CurrentUser.GetCardNumber();//GetMailId(); btnResendMail.Click += async delegate { CurrentUser.SaveCardNumber(editEmail.Text); await sc.AuthencateUser1(CurrentUser.GetCardNumber()); }; btnVerification.Click += delegate { EmailVerification(); }; }