Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Net/net/IPEndPointCollection.cs

@@ -0,0 +1,34 @@
+//------------------------------------------------------------------------------
+// <copyright file="IPEndPointCollection.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+namespace System.Net
+{
+    using System;
+    using System.Collections.Generic;
+    using System.Collections.ObjectModel;
+    using System.Text;
+
+    [Serializable]
+    public class IPEndPointCollection : Collection<IPEndPoint>
+    {
+        public IPEndPointCollection() { }
+        protected override void SetItem(int index, IPEndPoint item)
+        {
+            if (item == null)
+            {
+                throw new ArgumentNullException("item");
+            }
+            base.SetItem(index, item);
+        }
+        protected override void InsertItem(int index, IPEndPoint item)
+        {
+            if (item == null)
+            {
+                throw new ArgumentNullException("item");
+            }
+            base.InsertItem(index, item);
+        }
+    }
+}