1 files changed, 35 insertions, 1 deletions
diff --git a/MediaBrowser.Common/Extensions/CollectionExtensions.cs b/MediaBrowser.Common/Extensions/CollectionExtensions.cs
index f7c0e3cf0..215224398 100644
--- a/MediaBrowser.Common/Extensions/CollectionExtensions.cs
+++ b/MediaBrowser.Common/Extensions/CollectionExtensions.cs
@@ -1,3 +1,5 @@
+#pragma warning disable CS1591
+
 using System.Collections.Generic;
 
 namespace MediaBrowser.Common.Extensions
@@ -5,10 +7,42 @@ namespace MediaBrowser.Common.Extensions
     // The MS CollectionExtensions are only available in netcoreapp
     public static class CollectionExtensions
     {
-        public static TValue GetValueOrDefault<TKey, TValue> (this IReadOnlyDictionary<TKey, TValue> dictionary, TKey key)
+        public static TValue GetValueOrDefault<TKey, TValue>(this IReadOnlyDictionary<TKey, TValue> dictionary, TKey key)
         {
             dictionary.TryGetValue(key, out var ret);
             return ret;
         }
+
+        /// <summary>
+        /// Copies all the elements of the current collection to the specified list
+        /// starting at the specified destination array index. The index is specified as a 32-bit integer.
+        /// </summary>
+        /// <param name="source">The current collection that is the source of the elements.</param>
+        /// <param name="destination">The list that is the destination of the elements copied from the current collection.</param>
+        /// <param name="index">A 32-bit integer that represents the index in <c>destination</c> at which copying begins.</param>
+        /// <typeparam name="T"></typeparam>
+        public static void CopyTo<T>(this IReadOnlyList<T> source, IList<T> destination, int index = 0)
+        {
+            for (int i = 0; i < source.Count; i++)
+            {
+                destination[index + i] = source[i];
+            }
+        }
+
+        /// <summary>
+        /// Copies all the elements of the current collection to the specified list
+        /// starting at the specified destination array index. The index is specified as a 32-bit integer.
+        /// </summary>
+        /// <param name="source">The current collection that is the source of the elements.</param>
+        /// <param name="destination">The list that is the destination of the elements copied from the current collection.</param>
+        /// <param name="index">A 32-bit integer that represents the index in <c>destination</c> at which copying begins.</param>
+        /// <typeparam name="T"></typeparam>
+        public static void CopyTo<T>(this IReadOnlyCollection<T> source, IList<T> destination, int index = 0)
+        {
+            foreach (T item in source)
+            {
+                destination[index++] = item;
+            }
+        }
     }
 }