Program.cs

using CefSharp.Wpf;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.IO;
using System.Linq;
using System.Threading.Tasks;
using System.Windows;

namespace TestCef {
    class Program {

        [STAThread]
        static int Main (string[] args) {

            //To support High DPI this must be before CefSharp.BrowserSubprocess.SelfHost.Main so the BrowserSubprocess is DPI Aware
            CefSharp.Cef.EnableHighDPISupport();

            var exitCode = CefSharp.BrowserSubprocess.SelfHost.Main(args);

            if (exitCode >= 0) {
                return exitCode;
            }

            var settings = new CefSettings() {
                //By default CefSharp will use an in-memory cache, you need to specify a Cache Folder to persist data
                CachePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "CefSharp\\Cache"),
                BrowserSubprocessPath = System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName
            };

            //NOTE: WebRTC Device Id's aren't persisted as they are in Chrome see https://bitbucket.org/chromiumembedded/cef/issues/2064/persist-webrtc-deviceids-across-restart
            settings.CefCommandLineArgs.Add("enable-media-stream");
            //https://peter.sh/experiments/chromium-command-line-switches/#use-fake-ui-for-media-stream
            settings.CefCommandLineArgs.Add("use-fake-ui-for-media-stream");
            //For screen sharing add (see https://bitbucket.org/chromiumembedded/cef/issues/2582/allow-run-time-handling-of-media-access#comment-58677180)
            settings.CefCommandLineArgs.Add("enable-usermedia-screen-capturing");

            CefSharp.Cef.Initialize(settings, performDependencyCheck: false);

            var app = new App();
            app.InitializeComponent();
            return app.Run();

        }

    }
}