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// Copyright © 2013 The CefSharp Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
using System;
using System.Diagnostics;
using System.Threading.Tasks;
using CefSharp.Internals;
using CefSharp.RenderProcess;
namespace CefSharp.BrowserSubprocess
    /// <summary>
    /// When implementing your own BrowserSubprocess
    /// - Include an app.manifest with the dpi/compatability sections, this is required (this project contains the relevant).
    /// - If you are targeting x86/Win32 then you should set /LargeAddressAware (https://docs.microsoft.com/en-us/cpp/build/reference/largeaddressaware?view=vs-2017)
    /// </summary>
    public class Program
        public static int Main(string[] args)
            Debug.WriteLine("BrowserSubprocess starting up with command line: " + String.Join("\n", args));
            SubProcess.EnableHighDPISupport();
            int result;
            var type = args.GetArgumentValue(CefSharpArguments.SubProcessTypeArgument);
            var parentProcessId = -1;
            // The Crashpad Handler doesn't have any HostProcessIdArgument, so we must not try to
            // parse it lest we want an ArgumentNullException.
            if (type != "crashpad-handler")
                parentProcessId = int.Parse(args.GetArgumentValue(CefSharpArguments.HostProcessIdArgument));
                if (args.HasArgument(CefSharpArguments.ExitIfParentProcessClosed))
                    Task.Factory.StartNew(() => AwaitParentProcessExit(parentProcessId), TaskCreationOptions.LongRunning);
            // Use our custom subProcess provides features like EvaluateJavascript
            if (type == "renderer")
                //Add your own custom implementation of IRenderProcessHandler here
                IRenderProcessHandler handler = null;
                var wcfEnabled = args.HasArgument(CefSharpArguments.WcfEnabledArgument);
                var subProcess = wcfEnabled ? new WcfEnabledSubProcess(parentProcessId, handler, args) : new SubProcess(handler, args);
                using (subProcess)
                    result = subProcess.Run();
            else
                result = SubProcess.ExecuteProcess();
            Debug.WriteLine("BrowserSubprocess shutting down.");
            return result;
        private static async void AwaitParentProcessExit(int parentProcessId)
                var parentProcess = Process.GetProcessById(parentProcessId);
                parentProcess.WaitForExit();
            catch (Exception e)
                //main process probably died already
                Debug.WriteLine(e);
            await Task.Delay(1000); //wait a bit before exiting
            Debug.WriteLine("BrowserSubprocess shutting down forcibly.");
            Environment.Exit(0);

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