Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Data/System/Data/SqlClient/LocalDBConfig.cs

@@ -0,0 +1,84 @@
+//------------------------------------------------------------------------------
+// <copyright file="LocalDB.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+// <owner current="true" primary="true">antonam</owner>
+//------------------------------------------------------------------------------
+
+
+namespace System.Data
+{
+    using System.Configuration;
+    using System.Collections;    
+
+    internal sealed class LocalDBInstanceElement : ConfigurationElement
+    {
+        [ConfigurationProperty("name", IsRequired = true)]
+        public string Name
+        {
+            get
+            {
+                return this["name"] as string;
+            }
+        }
+
+        [ConfigurationProperty("version", IsRequired = true)]
+        public string Version
+        {
+            get
+            {
+                return this["version"] as string;
+            }
+        }
+    }
+
+    internal sealed class LocalDBInstancesCollection : ConfigurationElementCollection
+    {
+
+        private class TrimOrdinalIgnoreCaseStringComparer : IComparer
+        {
+            public int Compare(object x, object y)
+            {
+                string xStr = x as string;
+                if (xStr != null)
+                    x = xStr.Trim();
+
+                string yStr = y as string;
+                if (yStr != null)
+                    y = yStr.Trim();
+
+                return StringComparer.OrdinalIgnoreCase.Compare(x,y);
+            }
+        }
+
+        static readonly TrimOrdinalIgnoreCaseStringComparer s_comparer = new TrimOrdinalIgnoreCaseStringComparer();
+
+        internal LocalDBInstancesCollection()
+            : base(s_comparer)
+        {
+        }
+
+        protected override ConfigurationElement CreateNewElement()
+        {
+            return new LocalDBInstanceElement();
+        }
+
+        protected override object GetElementKey(ConfigurationElement element)
+        {
+            return ((LocalDBInstanceElement)element).Name;
+        }
+        
+    }
+
+    internal sealed class LocalDBConfigurationSection : ConfigurationSection
+    {
+        [ConfigurationProperty("localdbinstances", IsRequired = true)]
+        public LocalDBInstancesCollection LocalDbInstances
+        {
+            get
+            {
+                return (LocalDBInstancesCollection)this["localdbinstances"] ?? new LocalDBInstancesCollection();
+            }
+        }
+    }
+}