public EditUserPage (UserVM uservm)
		{
			BindingContext = uservm;

			UserName.SetBinding (Entry.TextProperty, "Name", BindingMode.TwoWay);

			UserAge.SetBinding (Entry.TextProperty, "Age", BindingMode.TwoWay);

			Savedata.Clicked += Savedata_Clicked;

			Content = new StackLayout { 
				Padding = new Thickness(50,20),
				Spacing = 20,
				Children = {
					UserName,
					UserAge,
					Savedata
				}
			};
		}
		async void Button_Clicked (object sender, EventArgs e)
		{
			var userItem = new UserVM(new User());
			ListViewData.Add (userItem);
			await Navigation.PushModalAsync (new EditUserPage(userItem));
		}