Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Configuration/System/Configuration/DateTimeConfigurationElement.cs

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+//------------------------------------------------------------------------------
+// <copyright file="DateTimeConfigurationElement.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+/*
+ * ImmutableCollections
+ *
+ * Copyright (c) 2004 Microsoft Corporation
+ */
+
+using System;
+using System.Collections;
+using System.Collections.Specialized;
+using System.Net;
+using System.Configuration;
+
+//
+// This file contains configuration collections that are used by multiple sections
+//
+#if ORCAS
+namespace System.Configuration {
+
+    class DateTimeConfigurationElement : ConfigurationElement {
+        private static ConfigurationPropertyCollection _properties;
+        private static readonly ConfigurationProperty _propValue =
+            new ConfigurationProperty("value", typeof(DateTime), DateTime.MinValue, ConfigurationPropertyOptions.IsKey);
+
+        static DateTimeConfigurationElement() {
+            // Property initialization
+            _properties = new ConfigurationPropertyCollection();
+            _properties.Add(_propValue);
+        }
+
+        bool _needsInit;
+        DateTime _initValue;
+
+        protected internal override ConfigurationPropertyCollection Properties {
+            get {
+                return _properties;
+            }
+        }
+        //
+        // Constructor
+        //
+        public DateTimeConfigurationElement() {
+        }
+
+        public DateTimeConfigurationElement(DateTime value) {
+            _needsInit = true;
+            _initValue = value;
+        }
+
+        protected internal override void Init() {
+            base.Init();
+
+            // We cannot initialize configuration properties in the constructor,
+            // because Properties is an overridable virtual property that 
+            // hence may not be available in the constructor.
+            if (_needsInit) {
+                _needsInit = false;
+                Value = _initValue;
+            }
+        }
+
+        //
+        // Properties
+        //
+
+        //
+        // ConfigurationPropertyOptions.IsKey="true"
+        //
+        [ConfigurationProperty("value", IsKey = true)]
+        public DateTime Value {
+            get {
+                return (DateTime)base[_propValue];
+            }
+            set {
+                base[_propValue] = value;
+            }
+        }
+    }
+}
+#endif