The tag 'XamlControlsResources' does not exist in XML namespace 'using:Microsoft.UI.Xaml.Controls'

Question

I was trying to use WinUI so I installed the plugin Microsoft.UI.Xaml (2.4.2) from Nuget and followed the instructions which says add This <XamlControlsResources xmlns="using:Microsoft.UI.Xaml.Controls"/> to my App.Xaml

and here is my App.Xaml file

<Application x:Class="WpfApp1.App"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:local="clr-namespace:WpfApp1"
    StartupUri="MainWindow.xaml">
        <Application.Resources>
            <XamlControlsResources xmlns="using:Microsoft.UI.Xaml.Controls" />
        </Application.Resources>
</Application>

but it says:

The tag 'XamlControlsResources' does not exist in XML namespace 'using:Microsoft.UI.Xaml.Controls'

i tried older versions from WinUI plugin and tried .Net Core and Framework but still having this problem

Answer 1

I believe this WinUI 2.4.2 library is only compatible if you create a UWP application, not a WPF app.

Having said that, according to this documentation from Microsoft, starting with WinUI 3, you will be able to do this in WPF.