private void btnLogin_Click(object sender, RoutedEventArgs e)
		{
			LoginLogic logic = new LoginLogic();

			try
			{
				logic.Login(this.txtUserName.Text, this.txtPassword.Password);
				this.DialogResult = true;
				currentUser = logic.currentUser;
				this.Close();				
			}
			catch(Zora.Core.Exceptions.ZoraException ex)
			{
				MessageBox.Show(ex.Result.ErrorCodeMessage);
			}
		}
		public MainWindow(UserInfo currentUser)
		{
			InitializeComponent();
			this.currentUser = currentUser;
		}