Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

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

@@ -0,0 +1,71 @@
+//------------------------------------------------------------------------------
+// <copyright file="ConnectionInterfaceCollection.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.UI.WebControls.WebParts {
+
+    using System;
+    using System.Collections;
+    using System.ComponentModel;
+
+    public sealed class ConnectionInterfaceCollection : ReadOnlyCollectionBase {
+
+        public static readonly ConnectionInterfaceCollection Empty = new ConnectionInterfaceCollection();
+
+        public ConnectionInterfaceCollection() {
+        }
+
+        public ConnectionInterfaceCollection(ICollection connectionInterfaces) {
+            Initialize(null, connectionInterfaces);
+        }
+
+        public ConnectionInterfaceCollection(ConnectionInterfaceCollection existingConnectionInterfaces,
+                                             ICollection connectionInterfaces) {
+            Initialize(existingConnectionInterfaces, connectionInterfaces);
+        }
+
+        private void Initialize(ConnectionInterfaceCollection existingConnectionInterfaces, ICollection connectionInterfaces) {
+            if (existingConnectionInterfaces != null) {
+                foreach (Type existingConnectionInterface in existingConnectionInterfaces) {
+                    // Don't need to check arg, since we know it is valid since it came
+                    // from a ConnectionInterfaceCollection.
+                    InnerList.Add(existingConnectionInterface);
+                }
+            }
+
+            if (connectionInterfaces != null) {
+                foreach (object obj in connectionInterfaces) {
+                    if (obj == null) {
+                        throw new ArgumentException(SR.GetString(SR.Collection_CantAddNull), "connectionInterfaces");
+                    }
+                    if (!(obj is Type)) {
+                        throw new ArgumentException(SR.GetString(SR.Collection_InvalidType, "Type"), "connectionInterfaces");
+                    }
+                    InnerList.Add(obj);
+                }
+            }
+        }
+
+        public bool Contains(Type value) {
+            return InnerList.Contains(value);
+        }
+
+        public int IndexOf(Type value) {
+            return InnerList.IndexOf(value);
+        }
+
+        public Type this[int index] {
+            get {
+                return (Type)InnerList[index];
+            }
+        }
+
+        public void CopyTo(Type[] array, int index) {
+            InnerList.CopyTo(array, index);
+        }
+    }
+}
+
+