Type Page1 not found in xmlns - xamarin

Question

I try to implement shell page nevertheless when trying to compile i get following error in MasterDetailShell.xaml. I assume something is wrong within the lines regardless path.
ContentTemplate="{DataTemplate local:Page1}"
Error:
Type Page1 not found in xmlns MobileAppXamarinForms
This is my code:
App.cs:
public partial class App : Application
{
public App()
{
InitializeComponent();
MainPage = new MasterDetailShell();
}
}
MasterDetailShell.cs
[XamlCompilation(XamlCompilationOptions.Compile)]
public partial class MasterDetailShell : Shell
{
public MasterDetailShell()
{
InitializeComponent();
}
}
MasterDetailShell.xaml
<?xml version="1.0" encoding="utf-8" ?>
<Shell xmlns="http://xamarin.com/schemas/2014/forms"
xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
xmlns:d="http://xamarin.com/schemas/2014/forms/design"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
x:Class="MobileAppXamarinForms.Views.MasterDetailShell.MasterDetailShell">
<FlyoutItem Title="MyTabbApp"
Shell.TabBarIsVisible="False"
FlyoutDisplayOptions="AsMultipleItems">
<ShellContent Title="Bears" Icon="" IsTabStop="True" ContentTemplate="{DataTemplate local:Page1}"></ShellContent>
<ShellContent Title="Bears" Icon="" IsTabStop="True" ContentTemplate="{DataTemplate local:Page2}"></ShellContent>
</FlyoutItem>
<ShellContent Title="About" Icon="" ContentTemplate="{DataTemplate local:Page1}"></ShellContent>
</Shell>
Files location:

Answer 1

you are using the local namespace without ever declaring it
xmlns:local="using:ThisIsTheNamespaceForPage1"
to determine which namespace to use, open Page.xaml.cs and look at its namespace declaration

Answer 2

I had the same problem but it has been fixed just correct the namespace of an necessary class or add an necessary class
xmlns:local="clr-namespace:DiplayAnimalCollection"
Using correct place
xmlns:local="clr-namespace:DiplayAnimalCollection.Views"