Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

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

@@ -0,0 +1,40 @@
+//------------------------------------------------------------------------------
+// <copyright file="PersonalizationStateInfoCollection.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+namespace System.Web.UI.WebControls.WebParts {
+
+    using System;
+    using System.Configuration.Provider;
+    using System.Web;
+    using System.Web.UI;
+
+    public sealed class PersonalizationProviderCollection : ProviderCollection {
+
+        new public PersonalizationProvider this[string name] {
+            get {
+                return (PersonalizationProvider)base[name];
+            }
+        }
+
+        public override void Add(ProviderBase provider) {
+            if (provider == null) {
+                throw new ArgumentNullException("provider");
+            }
+
+            if (!(provider is PersonalizationProvider)) {
+                throw new ArgumentException(
+                    SR.GetString(SR.Provider_must_implement_the_interface,
+                        provider.GetType().FullName, "PersonalizationProvider"));
+            }
+
+            base.Add(provider);
+        }
+
+        public void CopyTo(PersonalizationProvider[] array, int index) {
+            base.CopyTo(array, index);
+        }
+    }
+}