MainWindow.xaml

<Window
    x:Class="WebViewTest.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:WPF="clr-namespace:Microsoft.Toolkit.Win32.UI.Controls.WPF;assembly=Microsoft.Toolkit.Win32.UI.Controls"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:local="clr-namespace:WebViewTest"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    Title="MainWindow"
    Width="800"
    Height="450"
    mc:Ignorable="d">
    <Grid>
        <WPF:WebView x:Name="wvc" />
    </Grid>
</Window>

how can i install Microsoft.Toolkit.Forms.UI.Controls.WebView