WinForms: Prevent designer from setting any default values (#2265)

Author: merceyz

CefSharp.WinForms/ChromiumWebBrowser.cs

@@ -60,14 +60,14 @@ public class ChromiumWebBrowser : Control, IWebBrowserInternal, IWinFormsWebBrow
         /// MUST ONLY be cleared by DefaultFocusHandler.
         /// </summary>
         /// <value><c>true</c> if this instance is activating; otherwise, <c>false</c>.</value>
-        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
+        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DefaultValue(false)]
         public bool IsActivating { get; set; }
 
         /// <summary>
         /// Gets or sets the browser settings.
         /// </summary>
         /// <value>The browser settings.</value>
-        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
+        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DefaultValue(null)]
         public BrowserSettings BrowserSettings { get; set; }
         /// <summary>
         /// Gets or sets the request context.
@@ -97,13 +97,13 @@ public IRequestContext RequestContext
         /// <value><c>true</c> if this instance is loading; otherwise, <c>false</c>.</value>
         /// <remarks>In the WPF control, this property is implemented as a Dependency Property and fully supports data
         /// binding.</remarks>
-        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
+        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DefaultValue(false)]
         public bool IsLoading { get; private set; }
         /// <summary>
         /// The text that will be displayed as a ToolTip
         /// </summary>
         /// <value>The tooltip text.</value>
-        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
+        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DefaultValue(null)]
         public string TooltipText { get; private set; }
         /// <summary>
         /// The address (URL) which the browser control is currently displaying.
@@ -112,26 +112,26 @@ public IRequestContext RequestContext
         /// <value>The address.</value>
         /// <remarks>In the WPF control, this property is implemented as a Dependency Property and fully supports data
         /// binding.</remarks>
-        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
+        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DefaultValue(null)]
         public string Address { get; private set; }
 
         /// <summary>
         /// Implement <see cref="IDialogHandler" /> and assign to handle dialog events.
         /// </summary>
         /// <value>The dialog handler.</value>
-        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
+        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DefaultValue(null)]
         public IDialogHandler DialogHandler { get; set; }
         /// <summary>
         /// Implement <see cref="IJsDialogHandler" /> and assign to handle events related to JavaScript Dialogs.
         /// </summary>
         /// <value>The js dialog handler.</value>
-        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
+        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DefaultValue(null)]
         public IJsDialogHandler JsDialogHandler { get; set; }
         /// <summary>
         /// Implement <see cref="IKeyboardHandler" /> and assign to handle events related to key press.
         /// </summary>
         /// <value>The keyboard handler.</value>
-        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
+        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DefaultValue(null)]
         public IKeyboardHandler KeyboardHandler { get; set; }
         /// <summary>
         /// Implement <see cref="IRequestHandler" /> and assign to handle events related to browser requests.
@@ -143,31 +143,31 @@ public IRequestContext RequestContext
         /// Implement <see cref="IDownloadHandler" /> and assign to handle events related to downloading files.
         /// </summary>
         /// <value>The download handler.</value>
-        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
+        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DefaultValue(null)]
         public IDownloadHandler DownloadHandler { get; set; }
         /// <summary>
         /// Implement <see cref="ILoadHandler" /> and assign to handle events related to browser load status.
         /// </summary>
         /// <value>The load handler.</value>
-        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
+        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DefaultValue(null)]
         public ILoadHandler LoadHandler { get; set; }
         /// <summary>
         /// Implement <see cref="ILifeSpanHandler" /> and assign to handle events related to popups.
         /// </summary>
         /// <value>The life span handler.</value>
-        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
+        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DefaultValue(null)]
         public ILifeSpanHandler LifeSpanHandler { get; set; }
         /// <summary>
         /// Implement <see cref="IDisplayHandler" /> and assign to handle events related to browser display state.
         /// </summary>
         /// <value>The display handler.</value>
-        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
+        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DefaultValue(null)]
         public IDisplayHandler DisplayHandler { get; set; }
         /// <summary>
         /// Implement <see cref="IContextMenuHandler" /> and assign to handle events related to the browser context menu
         /// </summary>
         /// <value>The menu handler.</value>
-        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
+        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DefaultValue(null)]
         public IContextMenuHandler MenuHandler { get; set; }
         /// <summary>
         /// Implement <see cref="IRenderProcessMessageHandler" /> and assign to handle messages from the render process.
@@ -179,7 +179,7 @@ public IRequestContext RequestContext
         /// Implement <see cref="IFindHandler" /> to handle events related to find results.
         /// </summary>
         /// <value>The find handler.</value>
-        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
+        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DefaultValue(null)]
         public IFindHandler FindHandler { get; set; }
 
         /// <summary>
@@ -191,13 +191,13 @@ public IRequestContext RequestContext
         /// needing to override the logic in OnGotFocus. The implementation in
         /// DefaultFocusHandler relies on very detailed behavior of how WinForms and
         /// Windows interact during window activation.</remarks>
-        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
+        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DefaultValue(null)]
         public IFocusHandler FocusHandler { get; set; }
         /// <summary>
         /// Implement <see cref="IDragHandler" /> and assign to handle events related to dragging.
         /// </summary>
         /// <value>The drag handler.</value>
-        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
+        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DefaultValue(null)]
         public IDragHandler DragHandler { get; set; }
         /// <summary>
         /// Implement <see cref="IResourceHandlerFactory" /> and control the loading of resources
@@ -209,7 +209,7 @@ public IRequestContext RequestContext
         /// Implement <see cref="IGeolocationHandler" /> and assign to handle requests for permission to use geolocation.
         /// </summary>
         /// <value>The geolocation handler.</value>
-        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
+        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DefaultValue(null)]
         public IGeolocationHandler GeolocationHandler { get; set; }
 
         /// <summary>
@@ -294,31 +294,31 @@ public IRequestContext RequestContext
         /// <value><c>true</c> if this instance can go forward; otherwise, <c>false</c>.</value>
         /// <remarks>In the WPF control, this property is implemented as a Dependency Property and fully supports data
         /// binding.</remarks>
-        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
+        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DefaultValue(false)]
         public bool CanGoForward { get; private set; }
         /// <summary>
         /// A flag that indicates whether the state of the control current supports the GoBack action (true) or not (false).
         /// </summary>
         /// <value><c>true</c> if this instance can go back; otherwise, <c>false</c>.</value>
         /// <remarks>In the WPF control, this property is implemented as a Dependency Property and fully supports data
         /// binding.</remarks>
-        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
+        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DefaultValue(false)]
         public bool CanGoBack { get; private set; }
         /// <summary>
         /// A flag that indicates whether the WebBrowser is initialized (true) or not (false).
         /// </summary>
         /// <value><c>true</c> if this instance is browser initialized; otherwise, <c>false</c>.</value>
         /// <remarks>In the WPF control, this property is implemented as a Dependency Property and fully supports data
         /// binding.</remarks>
-        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
+        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DefaultValue(false)]
         public bool IsBrowserInitialized { get; private set; }
 
         /// <summary>
         /// A flag that indicates if you can execute javascript in the main frame.
         /// Flag is set to true in IRenderProcessMessageHandler.OnContextCreated.
         /// and false in IRenderProcessMessageHandler.OnContextReleased
         /// </summary>
-        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
+        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never), DefaultValue(false)]
         public bool CanExecuteJavascriptInMainFrame { get; private set; }
 
         /// <summary>