1 files changed, 100 insertions, 0 deletions
diff --git a/Xamarin.Forms.Core/ReadOnlyListAdapter.cs b/Xamarin.Forms.Core/ReadOnlyListAdapter.cs
new file mode 100644
index 00000000..0ffdaef5
--- /dev/null
+++ b/Xamarin.Forms.Core/ReadOnlyListAdapter.cs
@@ -0,0 +1,100 @@
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace Xamarin.Forms
+{
+	internal sealed class ReadOnlyListAdapter : IList
+	{
+		readonly IReadOnlyCollection<object> _collection;
+		readonly IReadOnlyList<object> _list;
+
+		public ReadOnlyListAdapter(IReadOnlyList<object> list)
+		{
+			_list = list;
+			_collection = list;
+		}
+
+		public ReadOnlyListAdapter(IReadOnlyCollection<object> collection)
+		{
+			_collection = collection;
+		}
+
+		public void CopyTo(Array array, int index)
+		{
+			throw new NotImplementedException();
+		}
+
+		public int Count
+		{
+			get { return _collection.Count; }
+		}
+
+		public bool IsSynchronized
+		{
+			get { throw new NotImplementedException(); }
+		}
+
+		public object SyncRoot
+		{
+			get { throw new NotImplementedException(); }
+		}
+
+		public IEnumerator GetEnumerator()
+		{
+			return _collection.GetEnumerator();
+		}
+
+		public int Add(object value)
+		{
+			throw new NotImplementedException();
+		}
+
+		public void Clear()
+		{
+			throw new NotImplementedException();
+		}
+
+		public bool Contains(object value)
+		{
+			return _list.Contains(value);
+		}
+
+		public int IndexOf(object value)
+		{
+			return _list.IndexOf(value);
+		}
+
+		public void Insert(int index, object value)
+		{
+			throw new NotImplementedException();
+		}
+
+		public bool IsFixedSize
+		{
+			get { throw new NotImplementedException(); }
+		}
+
+		public bool IsReadOnly
+		{
+			get { return true; }
+		}
+
+		public object this[int index]
+		{
+			get { return _list[index]; }
+			set { throw new NotImplementedException(); }
+		}
+
+		public void Remove(object value)
+		{
+			throw new NotImplementedException();
+		}
+
+		public void RemoveAt(int index)
+		{
+			throw new NotImplementedException();
+		}
+	}
+}
+\ No newline at end of file