Fix comments

src/Avalonia.Controls/Application.cs

@@ -208,10 +208,12 @@ namespace Avalonia
 
         /// <summary>
         /// Runs the application's main loop.
-        /// This will return when the <see cref="Avalonia.ShutdownMode"/> condition is met
-        /// or <see cref="Shutdown()"/> was called.
         /// </summary>
-        /// <returns>The application's exit code that is passed on the operating system.</returns>
+        /// <remarks>
+        /// This will return when the <see cref="Avalonia.Controls.ShutdownMode"/> condition is met
+        /// or <see cref="Shutdown(int)"/> was called. 
+        /// </remarks>
+        /// <returns>The application's exit code that is returned to the operating system on termination.</returns>
         public int Run()
         {
             return Run(new CancellationTokenSource());
@@ -219,12 +221,14 @@ namespace Avalonia
 
         /// <summary>
         /// Runs the application's main loop.
-        /// This will return when the <see cref="Avalonia.ShutdownMode"/> condition is met
-        /// or <see cref="Shutdown()"/> was called.
-        /// This also returns when <see cref="ICloseable"/> is closed.
         /// </summary>
+        /// <remarks>
+        /// This will return when the <see cref="Avalonia.Controls.ShutdownMode"/> condition is met
+        /// or <see cref="Shutdown(int)"/> was called.
+        /// This also returns when <see cref="ICloseable"/> is closed.
+        /// </remarks>
         /// <param name="closable">The closable to track.</param>
-        /// <returns>The application's exit code that is passed on the operating system.</returns>
+        /// <returns>The application's exit code that is returned to the operating system on termination.</returns>
         public int Run(ICloseable closable)
         {
             closable.Closed += (s, e) => _mainLoopCancellationTokenSource?.Cancel();
@@ -234,12 +238,14 @@ namespace Avalonia
 
         /// <summary>
         /// Runs the application's main loop.
-        /// This will return when the <see cref="Avalonia.ShutdownMode"/> condition is met
-        /// or <see cref="Shutdown()"/> was called.
         /// </summary>
+        /// <remarks>
+        /// This will return when the <see cref="Avalonia.Controls.ShutdownMode"/> condition is met
+        /// or <see cref="Shutdown(int)"/> was called.
+        /// </remarks>
         /// <param name="mainWindow">The window that is used as <see cref="MainWindow"/>
         /// when the <see cref="MainWindow"/> isn't already set.</param>
-        /// <returns>The application's exit code that is passed on the operating system.</returns>
+        /// <returns>The application's exit code that is returned to the operating system on termination.</returns>
         public int Run(Window mainWindow)
         {
             if (mainWindow == null)
@@ -264,11 +270,13 @@ namespace Avalonia
         }
         /// <summary>
         /// Runs the application's main loop.
-        /// This will return when the <see cref="Avalonia.ShutdownMode"/> condition is met
-        /// or <see cref="Shutdown()"/> was called.
-        /// This also returns when the <see cref="CancellationToken"/> is canceled.
         /// </summary>
-        /// <returns>The application's exit code that is passed on the operating system.</returns>
+        /// <remarks>
+        /// This will return when the <see cref="Avalonia.Controls.ShutdownMode"/> condition is met
+        /// or <see cref="Shutdown(int)"/> was called.
+        /// This also returns when the <see cref="CancellationToken"/> is canceled.
+        /// </remarks>
+        /// <returns>The application's exit code that is returned to the operating system on termination.</returns>
         /// <param name="token">The token to track.</param>
         public int Run(CancellationToken token)
         {
@@ -339,9 +347,7 @@ namespace Avalonia
 
                 OnExit(e);
 
-                _exitCode = e.ApplicationExitCode;
-
-                Environment.ExitCode = _exitCode;
+                _exitCode = e.ApplicationExitCode;                
             }
             finally
             {
@@ -350,6 +356,8 @@ namespace Avalonia
                 _mainLoopCancellationTokenSource = null;
 
                 IsShuttingDown = false;
+
+                Environment.ExitCode = _exitCode;
             }
         }
 

src/Avalonia.Controls/ShutdownMode.cs

@@ -1,20 +1,20 @@
 // Copyright (c) The Avalonia Project. All rights reserved.
 // Licensed under the MIT license. See licence.md file in the project root for full license information.
 
-namespace Avalonia
+namespace Avalonia.Controls
 {
     /// <summary>
-    /// Enum for ExitMode
+    /// Describes the possible values for <see cref="Application.ShutdownMode"/>.
     /// </summary>
     public enum ShutdownMode
     {
         /// <summary>
-        /// Indicates an implicit call to Application.Exit when the last window closes.
+        /// Indicates an implicit call to Application.Shutdown when the last window closes.
         /// </summary>
         OnLastWindowClose,
 
         /// <summary>
-        /// Indicates an implicit call to Application.Exit when the main window closes.
+        /// Indicates an implicit call to Application.Shutdown when the main window closes.
         /// </summary>
         OnMainWindowClose,
 

src/Avalonia.Controls/StartupEventArgs.cs

@@ -15,7 +15,7 @@ namespace Avalonia.Controls
         private string[] _args;
 
         /// <summary>
-        /// Gets command line arguments that were passed to the application.
+        /// Gets the command line arguments that were passed to the application.
         /// </summary>
         public IReadOnlyList<string> Args => _args ?? (_args = GetArgs());
 

tests/Avalonia.DesignerSupport.TestApp/App.xaml.cs

@@ -1,4 +1,9 @@
-using Avalonia.Markup.Xaml;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Avalonia.Markup.Xaml;
 
 namespace Avalonia.DesignerSupport.TestApp
 {