Imported Upstream version 4.2.0.179

Former-commit-id: 4610231f55806d2a05ed69e5ff3faa7336cc1479

external/referencesource/System.Configuration/System/Configuration/PropertyInformationCollection.cs

@@ -0,0 +1,89 @@
+//------------------------------------------------------------------------------
+// <copyright file="PropertyInformationCollection.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+using System;
+using System.Configuration;
+using System.Collections.Specialized;
+using System.ComponentModel;
+using System.Collections;
+using System.Runtime.Serialization;
+using System.Security.Permissions;
+
+namespace System.Configuration {
+
+    // PropertyInformationCollection
+    //
+    // Collection of PropertyInformation objects
+    //
+
+    [Serializable()]
+    public sealed class PropertyInformationCollection : NameObjectCollectionBase {
+        ConfigurationElement ThisElement = null;
+        internal PropertyInformationCollection(ConfigurationElement thisElement) : base(StringComparer.Ordinal) {
+            ThisElement = thisElement;
+            foreach (ConfigurationProperty prop in ThisElement.Properties) {
+                if (prop.Name != ThisElement.ElementTagName) {                    
+                    BaseAdd(prop.Name, new PropertyInformation(thisElement, prop.Name));
+                }
+            }
+            IsReadOnly = true;
+        }
+
+        [SecurityPermissionAttribute(SecurityAction.Demand,SerializationFormatter=true)]
+        public override void GetObjectData(SerializationInfo info, StreamingContext context) {
+            base.GetObjectData(info, context);
+        }
+
+        // Item
+        //
+        // Indexor for retrieving a Property by name
+        //
+        public PropertyInformation this[string propertyName] {
+            get {
+                PropertyInformation result = (PropertyInformation) BaseGet (propertyName);
+
+                // check for default collection name
+                if (result == null) {
+                    PropertyInformation defaultColl = 
+                        (PropertyInformation) BaseGet (ConfigurationProperty.DefaultCollectionPropertyName);
+
+                    if ((defaultColl != null) && (defaultColl.ProvidedName == propertyName)) {
+                        result = defaultColl;
+                    }
+                }
+                return result;   
+            }
+        }
+
+        internal PropertyInformation this[int index] {
+            get {
+                return (PropertyInformation)BaseGet(BaseGetKey(index));
+            }
+        }
+
+        public void CopyTo(PropertyInformation[] array, int index) {
+            if (array == null) {
+                throw new ArgumentNullException("array");
+            }
+
+            if (array.Length < Count + index) {
+                throw new ArgumentOutOfRangeException("index");
+            }
+
+            foreach (PropertyInformation pi in this) {
+                array[index++] = pi;
+            }
+        }
+
+
+        public override IEnumerator GetEnumerator() {
+            int c = Count;
+            for (int i = 0; i < c; i++) {
+                yield return this[i];
+            }
+        }
+    }
+}