/// <summary>
        /// Gets a person object an fills the textviews with it. It is called by the State Class
        /// Example: FillControls (person) -> txtGeneralName.text = person.Name ...etc.
        /// </summary>
        /// <param name="person">The selected person. The information of this person is displayed statically</param>
        async override public void FillControls(BusinessLayer.Person person)
        {
            // Fill the controls of VCKundenDetails
            TxtMainName.Text = person.Name;
            TxtMainEmail.Text = person.Email;
            TxtMainTelefon.Text = person.Telefon;
            TxtMainUmsatz.Text = await person.GetUmsatzAsync(Application._user);

        }