6 files changed, 57 insertions, 38 deletions
diff --git a/MediaBrowser.Controller/Entities/BaseItem.cs b/MediaBrowser.Controller/Entities/BaseItem.cs
index 053ee1b96..e3b5b5117 100644
--- a/MediaBrowser.Controller/Entities/BaseItem.cs
+++ b/MediaBrowser.Controller/Entities/BaseItem.cs
@@ -1295,7 +1295,7 @@ namespace MediaBrowser.Controller.Entities
                 }
             }
 
-            return string.Join("/", terms.ToArray(terms.Count));
+            return string.Join("/", terms.ToArray());
         }
 
         /// <summary>
@@ -1536,7 +1536,7 @@ namespace MediaBrowser.Controller.Entities
         {
             var newThemeVideos = LoadThemeVideos(fileSystemChildren, options.DirectoryService);
 
-            var newThemeVideoIds = newThemeVideos.Select(i => i.Id).ToArray(newThemeVideos.Length);
+            var newThemeVideoIds = newThemeVideos.Select(i => i.Id).ToArray();
 
             var themeVideosChanged = !item.ThemeVideoIds.SequenceEqual(newThemeVideoIds);
 
@@ -1573,7 +1573,7 @@ namespace MediaBrowser.Controller.Entities
         private async Task<bool> RefreshThemeSongs(BaseItem item, MetadataRefreshOptions options, List<FileSystemMetadata> fileSystemChildren, CancellationToken cancellationToken)
         {
             var newThemeSongs = LoadThemeSongs(fileSystemChildren, options.DirectoryService);
-            var newThemeSongIds = newThemeSongs.Select(i => i.Id).ToArray(newThemeSongs.Length);
+            var newThemeSongIds = newThemeSongs.Select(i => i.Id).ToArray();
 
             var themeSongsChanged = !item.ThemeSongIds.SequenceEqual(newThemeSongIds);
 
@@ -2110,9 +2110,8 @@ namespace MediaBrowser.Controller.Entities
                 }
                 else
                 {
-                    var list = current.ToArray(current.Length + 1);
-                    list[list.Length - 1] = name;
-                    Studios = list;
+                    var list = 
+                    Studios = current.Concat(new [] { name }).ToArray();
                 }
             }
         }
@@ -2252,9 +2251,7 @@ namespace MediaBrowser.Controller.Entities
             else
             {
                 var currentCount = ImageInfos.Length;
-                var newList = ImageInfos.ToArray(currentCount + 1);
-                newList[currentCount] = image;
-                ImageInfos = newList;
+                ImageInfos = ImageInfos.Concat(new [] { image }) .ToArray();
             }
         }
 
@@ -2269,10 +2266,7 @@ namespace MediaBrowser.Controller.Entities
 
             if (image == null)
             {
-                var currentCount = ImageInfos.Length;
-                var newList = ImageInfos.ToArray(currentCount + 1);
-                newList[currentCount] = GetImageInfo(file, type);
-                ImageInfos = newList;
+                ImageInfos = ImageInfos.Concat(new [] { GetImageInfo(file, type) }) .ToArray();
             }
             else
             {
@@ -2486,16 +2480,7 @@ namespace MediaBrowser.Controller.Entities
 
             if (newImageList.Count > 0)
             {
-                var currentCount = ImageInfos.Length;
-                var newList = ImageInfos.ToArray(currentCount + newImageList.Count);
-
-                foreach (var image in newImageList)
-                {
-                    newList[currentCount] = GetImageInfo(image, imageType);
-                    currentCount++;
-                }
-
-                ImageInfos = newList;
+                ImageInfos = ImageInfos.Concat(newImageList.Select(i => GetImageInfo(i, imageType))).ToArray();
             }
 
             return imageUpdated || newImageList.Count > 0;
@@ -2537,7 +2522,7 @@ namespace MediaBrowser.Controller.Entities
             var extensions = new List<string> { ".nfo", ".xml", ".srt", ".vtt", ".sub", ".idx", ".txt", ".edl", ".bif", ".smi", ".ttml" };
             extensions.AddRange(SupportedImageExtensions);
 
-            return FileSystem.GetFiles(FileSystem.GetDirectoryName(Path), extensions.ToArray(extensions.Count), false, false)
+            return FileSystem.GetFiles(FileSystem.GetDirectoryName(Path), extensions.ToArray(), false, false)
                 .Where(i => System.IO.Path.GetFileNameWithoutExtension(i.FullName).StartsWith(filename, StringComparison.OrdinalIgnoreCase))
                 .ToList();
         }
@@ -2776,7 +2761,7 @@ namespace MediaBrowser.Controller.Entities
         {
             var list = GetEtagValues(user);
 
-            return string.Join("|", list.ToArray(list.Count)).GetMD5().ToString("N");
+            return string.Join("|", list.ToArray()).GetMD5().ToString("N");
         }
 
         protected virtual List<string> GetEtagValues(User user)
diff --git a/MediaBrowser.Controller/Entities/BaseItemExtensions.cs b/MediaBrowser.Controller/Entities/BaseItemExtensions.cs
index c56a370a8..8ab1788b5 100644
--- a/MediaBrowser.Controller/Entities/BaseItemExtensions.cs
+++ b/MediaBrowser.Controller/Entities/BaseItemExtensions.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Linq;
 using System.Collections.Generic;
 using System.Threading;
 using System.Threading.Tasks;
@@ -61,5 +62,46 @@ namespace MediaBrowser.Controller.Entities
                 item.SetImagePath(imageType, BaseItem.FileSystem.GetFileInfo(file));
             }
         }
+        
+        /// <summary>
+        /// Copies all properties on object. Skips properties that do not exist.
+        /// </summary>
+        /// <param name="source">The source object.</param>
+        /// <param name="dest">The destination object.</param>
+        public static void DeepCopy<T, TU>(this T source, TU dest) 
+        where T : BaseItem
+        where TU : BaseItem
+        {
+            var sourceProps = typeof (T).GetProperties().Where(x => x.CanRead).ToList();
+            var destProps = typeof(TU).GetProperties()
+                    .Where(x => x.CanWrite)
+                    .ToList();
+
+            foreach (var sourceProp in sourceProps)
+            {
+                if (destProps.Any(x => x.Name == sourceProp.Name))
+                {
+                    var p = destProps.First(x => x.Name == sourceProp.Name);
+                    p.SetValue(dest, sourceProp.GetValue(source, null), null);                    
+                }
+
+            }
+
+        }
+
+        /// <summary>
+        /// Copies all properties on newly created object. Skips properties that do not exist.
+        /// </summary>
+        /// <param name="source">The source object.</param>
+        public static TU DeepCopy<T, TU>(this T source) 
+        where T : BaseItem
+        where TU : BaseItem, new()
+        {
+            var dest = new TU();
+            source.DeepCopy(dest);
+            return dest;
+        }
+
+
     }
 }
diff --git a/MediaBrowser.Controller/Entities/CollectionFolder.cs b/MediaBrowser.Controller/Entities/CollectionFolder.cs
index 8240a68ff..19a8c24b8 100644
--- a/MediaBrowser.Controller/Entities/CollectionFolder.cs
+++ b/MediaBrowser.Controller/Entities/CollectionFolder.cs
@@ -275,7 +275,7 @@ namespace MediaBrowser.Controller.Entities
 
             var changed = !linkedChildren.SequenceEqual(LinkedChildren, new LinkedChildComparer(FileSystem));
 
-            LinkedChildren = linkedChildren.ToArray(linkedChildren.Count);
+            LinkedChildren = linkedChildren.ToArray();
 
             var folderIds = PhysicalFolderIds;
             var newFolderIds = physicalFolders.Select(i => i.Id).ToArray();
diff --git a/MediaBrowser.Controller/Entities/Extensions.cs b/MediaBrowser.Controller/Entities/Extensions.cs
index c706cf36c..ee135a14e 100644
--- a/MediaBrowser.Controller/Entities/Extensions.cs
+++ b/MediaBrowser.Controller/Entities/Extensions.cs
@@ -35,10 +35,7 @@ namespace MediaBrowser.Controller.Entities
                 }
                 else
                 {
-                    var list = item.RemoteTrailers.ToArray(item.RemoteTrailers.Length + 1);
-                    list[list.Length - 1] = mediaUrl;
-
-                    item.RemoteTrailers = list;
+                    item.RemoteTrailers = item.RemoteTrailers.Concat(new [] { mediaUrl }).ToArray();
                 }
             }
         }
diff --git a/MediaBrowser.Controller/Entities/Folder.cs b/MediaBrowser.Controller/Entities/Folder.cs
index 8b9aa5fc3..81072b6e7 100644
--- a/MediaBrowser.Controller/Entities/Folder.cs
+++ b/MediaBrowser.Controller/Entities/Folder.cs
@@ -914,7 +914,7 @@ namespace MediaBrowser.Controller.Entities
                     // Try to preserve order
                     return result.OrderBy(i => ids.IndexOf(i.Id)).ToArray();
                 }
-                return result.ToArray(result.Count);
+                return result.ToArray();
             }
 
             return GetItemsInternal(query).Items;
@@ -1608,7 +1608,7 @@ namespace MediaBrowser.Controller.Entities
                     Logger.Info("Shortcut links have changed for {0}", Path);
 
                     newShortcutLinks.AddRange(LinkedChildren.Where(i => i.Type == LinkedChildType.Manual));
-                    LinkedChildren = newShortcutLinks.ToArray(newShortcutLinks.Count);
+                    LinkedChildren = newShortcutLinks.ToArray();
                     return true;
                 }
             }
diff --git a/MediaBrowser.Controller/Entities/TagExtensions.cs b/MediaBrowser.Controller/Entities/TagExtensions.cs
index e5d8f35d9..84e61be4f 100644
--- a/MediaBrowser.Controller/Entities/TagExtensions.cs
+++ b/MediaBrowser.Controller/Entities/TagExtensions.cs
@@ -1,7 +1,5 @@
 using System;
-using System.Collections.Generic;
 using System.Linq;
-using MediaBrowser.Model.Extensions;
 
 namespace MediaBrowser.Controller.Entities
 {
@@ -24,10 +22,7 @@ namespace MediaBrowser.Controller.Entities
                 }
                 else
                 {
-                    var list = current.ToArray(current.Length + 1);
-                    list[list.Length - 1] = name;
-
-                    item.Tags = list;
+                    item.Tags = current.Concat(new [] { name }).ToArray();
                 }
             }
         }