private UITextField ComposeTextFieldControl(bool secureTextEntry)
{
UITextField textField = new UITextField (new System.Drawing.RectangleF (12f, 45f, 260f, 25f));
textField.BackgroundColor = UIColor.White;
textField.UserInteractionEnabled = true;
textField.AutocorrectionType = UITextAutocorrectionType.No;
textField.AutocapitalizationType = UITextAutocapitalizationType.None;
textField.ReturnKeyType = UIReturnKeyType.Done;
textField.SecureTextEntry = secureTextEntry;
return textField;
}