Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

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

@@ -0,0 +1,74 @@
+//------------------------------------------------------------------------------
+// <copyright file="DataColumnChangeEvent.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;
+
+    /// <devdoc>
+    ///    <para>
+    ///       Provides data for the <see cref='System.Data.DataTable.ColumnChanging'/> event.
+    ///    </para>
+    /// </devdoc>
+    public class DataColumnChangeEventArgs : EventArgs {
+
+        private readonly DataRow _row;
+        private DataColumn _column;
+        private object _proposedValue;
+
+        internal DataColumnChangeEventArgs(DataRow row) {
+            _row = row;
+        }
+
+        /// <devdoc>
+        ///    <para>
+        ///       Initializes a new instance of the <see cref='System.Data.DataColumnChangeEventArgs'/> class.
+        ///    </para>
+        /// </devdoc>
+        public DataColumnChangeEventArgs(DataRow row, DataColumn column, object value) {
+            _row = row;
+            _column = column;
+            _proposedValue = value;
+        }
+
+        /// <devdoc>
+        ///    <para>Gets the column whose value is changing.</para>
+        /// </devdoc>
+        public DataColumn Column {
+            get {
+                return _column;
+            }
+        }
+
+        /// <devdoc>
+        ///    <para>Gets the row whose value is changing.</para>
+        /// </devdoc>
+        public DataRow Row {
+            get {
+                return _row;
+            }
+        }
+
+        /// <devdoc>
+        ///    <para>Gets or sets the proposed value.</para>
+        /// </devdoc>
+        public object ProposedValue {
+            get {
+                return _proposedValue;
+            }
+            set {
+                _proposedValue = value;
+            }
+        }
+        
+        internal void InitializeColumnChangeEvent(DataColumn column, object value) {            
+            _column = column;
+            _proposedValue = value;
+        }
+    }
+}