Imported Upstream version 5.0.0.42

Former-commit-id: fd56571888259555122d8a0f58c68838229cea2b

external/linker/cecil/Mono.Collections.Generic/ReadOnlyCollection.cs

@@ -0,0 +1,94 @@
+//
+// Author:
+//   Jb Evain (jbevain@gmail.com)
+//
+// Copyright (c) 2008 - 2015 Jb Evain
+// Copyright (c) 2008 - 2011 Novell, Inc.
+//
+// Licensed under the MIT/X11 license.
+//
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+
+namespace Mono.Collections.Generic {
+
+	public sealed class ReadOnlyCollection<T> : Collection<T>, ICollection<T>, IList {
+
+		static ReadOnlyCollection<T> empty;
+
+		public static ReadOnlyCollection<T> Empty {
+			get { return empty ?? (empty = new ReadOnlyCollection<T> ()); }
+		}
+
+		bool ICollection<T>.IsReadOnly {
+			get { return true; }
+		}
+
+		bool IList.IsFixedSize {
+			get { return true; }
+		}
+
+		bool IList.IsReadOnly {
+			get { return true; }
+		}
+
+		ReadOnlyCollection ()
+		{
+		}
+
+		public ReadOnlyCollection (T [] array)
+		{
+			if (array == null)
+				throw new ArgumentNullException ();
+
+			Initialize (array, array.Length);
+		}
+
+		public ReadOnlyCollection (Collection<T> collection)
+		{
+			if (collection == null)
+				throw new ArgumentNullException ();
+
+			Initialize (collection.items, collection.size);
+		}
+
+		void Initialize (T [] items, int size)
+		{
+			this.items = new T [size];
+			Array.Copy (items, 0, this.items, 0, size);
+			this.size = size;
+		}
+
+		internal override void Grow (int desired)
+		{
+			throw new InvalidOperationException ();
+		}
+
+		protected override void OnAdd (T item, int index)
+		{
+			throw new InvalidOperationException ();
+		}
+
+		protected override void OnClear ()
+		{
+			throw new InvalidOperationException ();
+		}
+
+		protected override void OnInsert (T item, int index)
+		{
+			throw new InvalidOperationException ();
+		}
+
+		protected override void OnRemove (T item, int index)
+		{
+			throw new InvalidOperationException ();
+		}
+
+		protected override void OnSet (T item, int index)
+		{
+			throw new InvalidOperationException ();
+		}
+	}
+}