extracted an item refresh service

MediaBrowser.Controller/Entities/Audio/Artist.cs

@@ -4,7 +4,7 @@ namespace MediaBrowser.Controller.Entities.Audio
     /// <summary>
     /// Class Artist
     /// </summary>
-    public class Artist : BaseItem
+    public class Artist : BaseItem, IItemByName
     {
         /// <summary>
         /// Gets the user data key.

MediaBrowser.Controller/Entities/Audio/MusicGenre.cs

@@ -4,7 +4,7 @@ namespace MediaBrowser.Controller.Entities.Audio
     /// <summary>
     /// Class MusicGenre
     /// </summary>
-    public class MusicGenre : BaseItem
+    public class MusicGenre : BaseItem, IItemByName
     {
         /// <summary>
         /// Gets the user data key.

MediaBrowser.Controller/Entities/Genre.cs

@@ -4,7 +4,7 @@ namespace MediaBrowser.Controller.Entities
     /// <summary>
     /// Class Genre
     /// </summary>
-    public class Genre : BaseItem
+    public class Genre : BaseItem, IItemByName
     {
         /// <summary>
         /// Gets the user data key.

MediaBrowser.Controller/Entities/IItemByName.cs

@@ -0,0 +1,10 @@
+
+namespace MediaBrowser.Controller.Entities
+{
+    /// <summary>
+    /// Marker interface
+    /// </summary>
+    public interface IItemByName
+    {
+    }
+}

MediaBrowser.Controller/Entities/Person.cs

@@ -4,7 +4,7 @@ namespace MediaBrowser.Controller.Entities
     /// <summary>
     /// This is the full Person object that can be retrieved with all of it's data.
     /// </summary>
-    public class Person : BaseItem
+    public class Person : BaseItem, IItemByName
     {
         /// <summary>
         /// Gets the user data key.

MediaBrowser.Controller/Entities/Studio.cs

@@ -4,7 +4,7 @@ namespace MediaBrowser.Controller.Entities
     /// <summary>
     /// Class Studio
     /// </summary>
-    public class Studio : BaseItem
+    public class Studio : BaseItem, IItemByName
     {
         /// <summary>
         /// Gets the user data key.

MediaBrowser.Controller/Entities/Year.cs

@@ -4,7 +4,7 @@ namespace MediaBrowser.Controller.Entities
     /// <summary>
     /// Class Year
     /// </summary>
-    public class Year : BaseItem
+    public class Year : BaseItem, IItemByName
     {
         /// <summary>
         /// Gets the user data key.

MediaBrowser.Controller/MediaBrowser.Controller.csproj

@@ -76,6 +76,7 @@
     <Compile Include="Entities\Audio\MusicGenre.cs" />
     <Compile Include="Entities\Game.cs" />
     <Compile Include="Entities\IByReferenceItem.cs" />
+    <Compile Include="Entities\IItemByName.cs" />
     <Compile Include="Entities\MusicVideo.cs" />
     <Compile Include="Library\ILibraryPostScanTask.cs" />
     <Compile Include="Library\ILibraryPrescanTask.cs" />