WinForms dies in EndInit of Microsoft.Toolkit.Win32.UI.Controls.WinForms.WebView

Question

I am trying to add a WebView to a WinForm in order to use a modern browser in an application.

Starting with a blank WinForm, I added code to create the WebView and add it to the form's controls.

using System;
using System.ComponentModel;
using System.Windows.Forms;

namespace TestWebView
{
    public partial class Form1 : Form
    {

        public Form1()
        {
            InitializeComponent();

            var wvc = new Microsoft.Toolkit.Win32.UI.Controls.WinForms.WebView();
            ((ISupportInitialize)wvc).BeginInit();
            wvc.Dock = DockStyle.Fill;
            Controls.Add(wvc);
            ((ISupportInitialize)wvc).EndInit();

            // You can also use the Source property
            wvc.Navigate(new Uri("https://www.microsoft.com"));
        }
    }
}

This compiles and runs, but the EndInit() call does not finish. No exceptions are thrown. The call enters but does not leave.

The project is set for .NET Framework 4.7.1. I used the NuGet Manager to add Microsoft.Toolkit.WIn32.UI.Controls v4.0.2 to the project. I am following the instructions on https://blogs.windows.com/msedgedev/2018/05/09/modern-webview-winforms-wpf-apps/

Why is this not working?

Answer 1

I am running Visual Studio as Administrator.

If I run VS normally, the WebView works.

So, now I have a different problem: How do I run a WebView as Administrator?

Thank you to Steve and Jimi for the helpful comments.