diff --git a/sandbox/ConsoleApp/Program.cs b/sandbox/ConsoleApp/Program.cs
index c7c16e2..04ad310 100644
--- a/sandbox/ConsoleApp/Program.cs
+++ b/sandbox/ConsoleApp/Program.cs
@@ -7,7 +7,9 @@ namespace ConsoleApp
     {
         static void Main(string[] args)
         {
+            var oc = new ObservableList<int>();
 
+            oc.AddRange(new[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 }.AsEnumerable());
 
         }
     }
diff --git a/src/ObservableCollections.Unity/Assets/Plugins/ObservableCollections/Runtime/Internal/CloneCollection.cs b/src/ObservableCollections.Unity/Assets/Plugins/ObservableCollections/Runtime/Internal/CloneCollection.cs
index 69648d5..43bd988 100644
--- a/src/ObservableCollections.Unity/Assets/Plugins/ObservableCollections/Runtime/Internal/CloneCollection.cs
+++ b/src/ObservableCollections.Unity/Assets/Plugins/ObservableCollections/Runtime/Internal/CloneCollection.cs
@@ -22,6 +22,7 @@ namespace ObservableCollections.Internal
         {
             this.array = ArrayPool<T>.Shared.Rent(1);
             this.length = 1;
+            this.array[0] = item;
         }
 
         public CloneCollection(IEnumerable<T> source)
@@ -113,7 +114,7 @@ namespace ObservableCollections.Internal
             public void Add(T item) => throw new NotSupportedException();
             public void Clear() => throw new NotSupportedException();
             public bool Contains(T item) => throw new NotSupportedException();
-            public void CopyTo(T[] dest, int destIndex) => array.CopyTo(dest, destIndex);
+            public void CopyTo(T[] dest, int destIndex) =>  Array.Copy(array, 0, dest, destIndex, count);
 
             public IEnumerator<T> GetEnumerator()
             {
diff --git a/src/ObservableCollections/Internal/CloneCollection.cs b/src/ObservableCollections/Internal/CloneCollection.cs
index 9593574..fb72d60 100644
--- a/src/ObservableCollections/Internal/CloneCollection.cs
+++ b/src/ObservableCollections/Internal/CloneCollection.cs
@@ -114,7 +114,7 @@ namespace ObservableCollections.Internal
             public void Add(T item) => throw new NotSupportedException();
             public void Clear() => throw new NotSupportedException();
             public bool Contains(T item) => throw new NotSupportedException();
-            public void CopyTo(T[] dest, int destIndex) => array.CopyTo(dest, destIndex);
+            public void CopyTo(T[] dest, int destIndex) =>  Array.Copy(array, 0, dest, destIndex, count);
 
             public IEnumerator<T> GetEnumerator()
             {