Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Data/System/Data/BaseCollection.cs

@@ -0,0 +1,99 @@
+//------------------------------------------------------------------------------
+// <copyright file="BaseCollection.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                         
+// <owner current="true" primary="true">[....]</owner>
+// <owner current="true" primary="false">[....]</owner>
+// <owner current="false" primary="false">[....]</owner>
+//------------------------------------------------------------------------------
+
+namespace System.Data {
+    using System;
+    using System.Collections;
+    using System.ComponentModel;
+    using System.Globalization;
+
+    /// <devdoc>
+    ///    <para>Provides the base functionality for creating collections.</para>
+    /// </devdoc>
+    public class InternalDataCollectionBase : ICollection {
+        internal static CollectionChangeEventArgs RefreshEventArgs = new CollectionChangeEventArgs(CollectionChangeAction.Refresh, null);
+
+        //==================================================
+        // the ICollection methods
+        //==================================================
+        /// <devdoc>
+        ///    <para>Gets the total number of elements in a collection.</para>
+        /// </devdoc>
+        [
+        Browsable(false)
+        ]
+        public virtual int Count {
+            get {
+                return List.Count;
+            }
+        }
+
+        public virtual void CopyTo(Array ar, int index) {
+            List.CopyTo(ar, index);
+        }
+
+        public virtual IEnumerator GetEnumerator() {
+            return List.GetEnumerator();
+        }
+
+        [
+        Browsable(false)
+        ]
+        public bool IsReadOnly {
+            get {
+                return false;
+            }
+        }
+
+        [Browsable(false)]
+        public bool IsSynchronized {
+            get {
+                // so the user will know that it has to lock this object
+                return false;
+            }
+        }
+
+        // Return value: 
+        // > 0 (1)  : CaseSensitve equal      
+        // < 0 (-1) : Case-Insensitive Equal
+        // = 0      : Not Equal
+        internal int NamesEqual(string s1, string s2, bool fCaseSensitive, CultureInfo locale) {
+            if (fCaseSensitive) {
+                if (String.Compare(s1, s2, false, locale) == 0)
+                    return 1;
+                else
+                    return 0;
+            }
+            
+            // Case, kana and width -Insensitive compare
+            if (locale.CompareInfo.Compare(s1, s2, 
+                CompareOptions.IgnoreCase | CompareOptions.IgnoreKanaType | CompareOptions.IgnoreWidth) == 0) {
+                if (String.Compare(s1, s2, false, locale) == 0)
+                    return 1;
+                else
+                    return -1;
+            }
+            return 0;
+        }
+
+
+        [Browsable(false)]
+        public object SyncRoot {
+            get {
+                return this;
+            }
+        }
+
+        protected virtual ArrayList List {
+            get {
+                return null;
+            }
+        }
+    }
+}