Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/UI/WebParts/ProviderConnectionPointCollection.cs

@@ -0,0 +1,78 @@
+//------------------------------------------------------------------------------
+// <copyright file="ProviderConnectionPointCollection.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+namespace System.Web.UI.WebControls.WebParts {
+
+    using System;
+    using System.Collections;
+    using System.Collections.Specialized;
+    using System.Globalization;
+
+    public sealed class ProviderConnectionPointCollection : ReadOnlyCollectionBase {
+
+        private HybridDictionary _ids;
+
+        public ProviderConnectionPointCollection() {
+        }
+
+        public ProviderConnectionPointCollection(ICollection connectionPoints) {
+            if (connectionPoints == null) {
+                throw new ArgumentNullException("connectionPoints");
+            }
+
+            _ids = new HybridDictionary(connectionPoints.Count, true /* caseInsensitive */);
+            foreach (object obj in connectionPoints) {
+                if (obj == null) {
+                    throw new ArgumentException(SR.GetString(SR.Collection_CantAddNull), "connectionPoints");
+                }
+                ProviderConnectionPoint point = obj as ProviderConnectionPoint;
+                if (point == null) {
+                    throw new ArgumentException(SR.GetString(SR.Collection_InvalidType, "ProviderConnectionPoint"),
+                                                "connectionPoints");
+                }
+                string id = point.ID;
+                if (!_ids.Contains(id)) {
+                    InnerList.Add(point);
+                    _ids.Add(id, point);
+                }
+                else {
+                    throw new ArgumentException(SR.GetString(SR.WebPart_Collection_DuplicateID, "ProviderConnectionPoint", id), "connectionPoints");
+                }
+            }
+        }
+
+        public ProviderConnectionPoint Default {
+            get {
+                return this[ConnectionPoint.DefaultID];
+            }
+        }
+
+        public ProviderConnectionPoint this[int index] {
+            get {
+                return (ProviderConnectionPoint)InnerList[index];
+            }
+        }
+
+        public ProviderConnectionPoint this[string id] {
+            get {
+                return ((_ids != null) ? (ProviderConnectionPoint)_ids[id] : null);
+            }
+        }
+
+        public bool Contains(ProviderConnectionPoint connectionPoint) {
+            return InnerList.Contains(connectionPoint);
+        }
+
+        public int IndexOf(ProviderConnectionPoint connectionPoint) {
+            return InnerList.IndexOf(connectionPoint);
+        }
+
+        public void CopyTo(ProviderConnectionPoint[] array, int index) {
+            InnerList.CopyTo(array, index);
+        }
+    }
+}
+
+