WinFormsEdgeBrower

This code sets the browser emulation feature for the process named "Microsoft Internet Explorer" to 99999.

//upgrade browser compatibility
  var appName = System.Diagnostics.Process.GetCurrentProcess().ProcessName + ".exe";

  using (var Key = Registry.CurrentUser.OpenSubKey(@"SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION", true))
    Key.SetValue(appName, 99999, RegistryValueKind.DWord);