Use IHostLifetime to handle restarting and shutting down

MediaBrowser.Common/IApplicationHost.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using System.Reflection;
-using System.Threading.Tasks;
 using Microsoft.Extensions.DependencyInjection;
 
 namespace MediaBrowser.Common
@@ -42,10 +41,15 @@ namespace MediaBrowser.Common
         bool HasPendingRestart { get; }
 
         /// <summary>
-        /// Gets a value indicating whether this instance is currently shutting down.
+        /// Gets or sets a value indicating whether this instance is currently shutting down.
         /// </summary>
         /// <value><c>true</c> if this instance is shutting down; otherwise, <c>false</c>.</value>
-        bool IsShuttingDown { get; }
+        bool IsShuttingDown { get; set; }
+
+        /// <summary>
+        /// Gets or sets a value indicating whether the application should restart.
+        /// </summary>
+        bool ShouldRestart { get; set; }
 
         /// <summary>
         /// Gets the application version.
@@ -87,11 +91,6 @@ namespace MediaBrowser.Common
         /// </summary>
         void NotifyPendingRestart();
 
-        /// <summary>
-        /// Restarts this instance.
-        /// </summary>
-        void Restart();
-
         /// <summary>
         /// Gets the exports.
         /// </summary>
@@ -123,12 +122,6 @@ namespace MediaBrowser.Common
         /// <returns>``0.</returns>
         T Resolve<T>();
 
-        /// <summary>
-        /// Shuts down.
-        /// </summary>
-        /// <returns>A task.</returns>
-        Task Shutdown();
-
         /// <summary>
         /// Initializes this instance.
         /// </summary>

MediaBrowser.Common/Plugins/IPluginManager.cs

@@ -29,11 +29,6 @@ namespace MediaBrowser.Common.Plugins
         /// <returns>An IEnumerable{Assembly}.</returns>
         IEnumerable<Assembly> LoadAssemblies();
 
-        /// <summary>
-        /// Unloads all of the assemblies.
-        /// </summary>
-        void UnloadAssemblies();
-
         /// <summary>
         /// Registers the plugin's services with the DI.
         /// Note: DI is not yet instantiated yet.