void SignInViewModel_PropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs e)
{
var vm = sender as SignInViewModel;
switch (e.PropertyName)
{
case "SignInRequired":
{
if (vm.SignInRequired)
{
if (!(MainPage is SignInPage))
{
MainPage = new SignInPage(vm);
}
}
else
{
MainPage = new MyMasterDetailPage();
}
break;
}
}
}