Remove parameterless constructor for now.

- Need to find a clean way to create an OutOfProcessHost and assign it to a ChromiumWebBrowser
  instance

Author: amaitland

CefSharp.OutOfProcess.WinForms/ChromiumWebBrowser.cs

@@ -59,8 +59,18 @@ public class ChromiumWebBrowser : Control, IChromiumWebBrowserInternal
         /// <inheritdoc/>
         public event EventHandler DevToolsContextAvailable;
 
+        /// <summary>
+        /// ChromiumWebBrowser constructor
+        /// </summary>
+        /// <param name="host">Out of process host</param>
+        /// <param name="initialAddress">address that will be initially loaded in the browser</param>
         public ChromiumWebBrowser(OutOfProcessHost host, string initialAddress)
         {
+            if(host == null)
+            {
+                throw new ArgumentNullException(nameof(host));
+            }
+
             _host = host;
             _initialAddress = initialAddress;
         }

CefSharp.OutOfProcess.Wpf.HwndHost.Example/App.xaml.cs

@@ -1,9 +1,7 @@
-// Copyright © 2019 The CefSharp Authors. All rights reserved.
+// Copyright © 2022 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.IO;
 using System.Windows;
 
 namespace CefSharp.OutOfProcess.Wpf.HwndHost.Example
@@ -13,26 +11,6 @@ namespace CefSharp.OutOfProcess.Wpf.HwndHost.Example
     /// </summary>
     public partial class App : Application
     {
-#if DEBUG
-        private string _buildType = "Debug";
-#else
-        private string _buildType = "Release";
-#endif
 
-#if NETCOREAPP3_1_OR_GREATER
-        private string _targetFramework = "netcoreapp3.1";
-#else
-        private string _targetFramework = "net462";
-#endif
-
-        protected override void OnStartup(StartupEventArgs e)
-        {
-            base.OnStartup(e);
-
-            var outOfProcessHostPath = Path.GetFullPath($"..\\..\\..\\..\\CefSharp.OutOfProcess.BrowserProcess\\bin\\{_buildType}\\{_targetFramework}");
-            outOfProcessHostPath = Path.Combine(outOfProcessHostPath, OutOfProcessHost.HostExeName);
-
-            ChromiumWebBrowser.SetHostProcessPath(outOfProcessHostPath);
-        }
     }
 }

CefSharp.OutOfProcess.Wpf.HwndHost/ChromiumWebBrowser.cs

@@ -28,13 +28,11 @@ namespace CefSharp.OutOfProcess.Wpf.HwndHost
     /// and https://stackoverflow.com/questions/6500336/custom-dwm-drawn-window-frame-flickers-on-resizing-if-the-window-contains-a-hwnd/17471534#17471534
     public class ChromiumWebBrowser : System.Windows.Interop.HwndHost, IChromiumWebBrowserInternal
     {
-        public const string BrowserNotInitializedExceptionErrorMessage =
+        private const string BrowserNotInitializedExceptionErrorMessage =
             "The ChromiumWebBrowser instance creates the underlying Chromium Embedded Framework (CEF) browser instance in an async fashion. " +
             "The undelying CefBrowser instance is not yet initialized. Use the IsBrowserInitializedChanged event and check " +
             "the IsBrowserInitialized property to determine when the browser has been initialized.";
 
-        private static string _defaultHostProcessPath;
-
         private const int WS_CHILD = 0x40000000,
             WS_VISIBLE = 0x10000000,
             LBS_NOTIFY = 0x00000001,
@@ -275,21 +273,18 @@ public bool IsDisposed
         /// <value>The redo command.</value>
         public ICommand RedoCommand { get; private set; }
 
-        /// <summary>
-        /// Initializes a new instance of the <see cref="ChromiumWebBrowser"/> instance.
-        /// </summary>
-        public ChromiumWebBrowser() : this(null, null)
-        {
-            
-        }
-
         /// <summary>
         /// Initializes a new instance of the <see cref="ChromiumWebBrowser"/> instance.
         /// </summary>
         /// <param name="host">Out of process host</param>
         /// <param name="initialAddress">address to load initially</param>
-        public ChromiumWebBrowser(OutOfProcessHost host, string initialAddress)
+        public ChromiumWebBrowser(OutOfProcessHost host, string initialAddress = null)
         {
+            if(host == null)
+            {
+                throw new ArgumentNullException(nameof(host));
+            }
+
             _host = host;
             _initialAddress = initialAddress;
 
@@ -323,15 +318,6 @@ public ChromiumWebBrowser(OutOfProcessHost host, string initialAddress)
             UseLayoutRounding = true;
         }
 
-        /// <summary>
-        /// Used when control is created through xaml or using default constructor
-        /// </summary>
-        /// <param name="path"></param>
-        public static void SetHostProcessPath(string path)
-        {
-            _defaultHostProcessPath = path;
-        }
-
         /// <inheritdoc/>
         int IChromiumWebBrowserInternal.Id
         {
@@ -505,29 +491,12 @@ protected override HandleRef BuildWindowCore(HandleRef hwndParent)
                             0);
             }
 
-            if (_host == null)
-            {
-                _ = OutOfProcessHost.CreateAsync(_defaultHostProcessPath).ContinueWith((t) =>
-                {
-                    _host = t.Result;
-
-                    _host.CreateBrowser(this, _hwndHost, url: _initialAddress, out _id);
-
-                    _devToolsContextConnectionTransport = new OutOfProcessConnectionTransport(_id, _host);
-
-                    var connection = DevToolsConnection.Attach(_devToolsContextConnectionTransport);
-                    _devToolsContext = Puppeteer.DevToolsContext.CreateForOutOfProcess(connection);
-                }, TaskScheduler.Default);
-            }
-            else
-            {
-                _host.CreateBrowser(this, _hwndHost, url: _initialAddress, out _id);
+            _host.CreateBrowser(this, _hwndHost, url: _initialAddress, out _id);
 
-                _devToolsContextConnectionTransport = new OutOfProcessConnectionTransport(_id, _host);
+            _devToolsContextConnectionTransport = new OutOfProcessConnectionTransport(_id, _host);
 
-                var connection = DevToolsConnection.Attach(_devToolsContextConnectionTransport);
-                _devToolsContext = Puppeteer.DevToolsContext.CreateForOutOfProcess(connection);
-            }
+            var connection = DevToolsConnection.Attach(_devToolsContextConnectionTransport);
+            _devToolsContext = Puppeteer.DevToolsContext.CreateForOutOfProcess(connection);
 
             return new HandleRef(null, _hwndHost);
         }