1 files changed, 22 insertions, 5 deletions
diff --git a/MediaBrowser.Controller/Entities/BaseItemExtensions.cs b/MediaBrowser.Controller/Entities/BaseItemExtensions.cs
index 8a69971d0..e88121212 100644
--- a/MediaBrowser.Controller/Entities/BaseItemExtensions.cs
+++ b/MediaBrowser.Controller/Entities/BaseItemExtensions.cs
@@ -1,5 +1,6 @@
 #pragma warning disable CS1591
 
+using System;
 using System.Linq;
 using MediaBrowser.Model.Entities;
 using MediaBrowser.Model.IO;
@@ -45,7 +46,8 @@ namespace MediaBrowser.Controller.Entities
         {
             if (file.StartsWith("http", System.StringComparison.OrdinalIgnoreCase))
             {
-                item.SetImage(new ItemImageInfo
+                item.SetImage(
+                new ItemImageInfo
                 {
                     Path = file,
                     Type = imageType
@@ -62,10 +64,22 @@ namespace MediaBrowser.Controller.Entities
         /// </summary>
         /// <param name="source">The source object.</param>
         /// <param name="dest">The destination object.</param>
+        /// <typeparam name="T">Source type.</typeparam>
+        /// <typeparam name="TU">Destination type.</typeparam>
         public static void DeepCopy<T, TU>(this T source, TU dest)
-        where T : BaseItem
-        where TU : BaseItem
+            where T : BaseItem
+            where TU : BaseItem
         {
+            if (source == null)
+            {
+                throw new ArgumentNullException(nameof(source));
+            }
+
+            if (dest == null)
+            {
+                throw new ArgumentNullException(nameof(dest));
+            }
+
             var destProps = typeof(TU).GetProperties().Where(x => x.CanWrite).ToList();
 
             foreach (var sourceProp in typeof(T).GetProperties())
@@ -97,9 +111,12 @@ namespace MediaBrowser.Controller.Entities
         /// Copies all properties on newly created object. Skips properties that do not exist.
         /// </summary>
         /// <param name="source">The source object.</param>
+        /// <typeparam name="T">Source type.</typeparam>
+        /// <typeparam name="TU">Destination type.</typeparam>
+        /// <returns>Destination object.</returns>
         public static TU DeepCopy<T, TU>(this T source)
-        where T : BaseItem
-        where TU : BaseItem, new()
+            where T : BaseItem
+            where TU : BaseItem, new()
         {
             var dest = new TU();
             source.DeepCopy(dest);