<Window x:Class="MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:wv2="clr-namespace:Microsoft.Web.WebView2.Wpf;assembly=Microsoft.Web.WebView2.Wpf"
        Title="Wegap Widget" Height="600" Width="800">
  <Grid>
    <wv2:WebView2 Name="wegapWebView" />
  </Grid>
</Window>

public partial class MainWindow : Window
{
    public MainWindow()
    {
        InitializeComponent();
        wegapWebView.Source = new Uri("https://wegap.net/widget/YOUR_WORKSPACE_ID");
    }
}