Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

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

@@ -0,0 +1,80 @@
+//------------------------------------------------------------------------------
+// <copyright file="DataRelationPropertyDescriptor.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.ComponentModel;
+
+    /// <devdoc>
+    ///    <para>[To be supplied.]</para>
+    /// </devdoc>    
+    internal sealed class DataRelationPropertyDescriptor : PropertyDescriptor {
+
+        DataRelation relation;
+
+        internal DataRelation Relation {
+            get {
+                return relation;
+            }
+        }
+
+        internal DataRelationPropertyDescriptor(DataRelation dataRelation) : base(dataRelation.RelationName, null) {
+            this.relation = dataRelation; 
+        }
+
+        public override Type ComponentType {
+            get {
+                return typeof(DataRowView);
+            }
+        }
+
+        public override bool IsReadOnly {
+            get {
+                return false;
+            }
+        }
+
+        public override Type PropertyType {
+            get {
+                return typeof(IBindingList);
+            }
+        }
+
+        public override bool Equals(object other) {
+            if (other is DataRelationPropertyDescriptor) {
+                DataRelationPropertyDescriptor descriptor = (DataRelationPropertyDescriptor) other;
+                return(descriptor.Relation == Relation);
+            }
+            return false;
+        }
+
+        public override Int32 GetHashCode() {
+            return Relation.GetHashCode();
+        }
+
+        public override bool CanResetValue(object component) {
+            return false;
+        }
+
+        public override object GetValue(object component) {
+            DataRowView dataRowView = (DataRowView) component;
+            return dataRowView.CreateChildView(relation);
+        }
+
+        public override void ResetValue(object component) {
+        }
+
+        public override void SetValue(object component, object value) {
+        }
+
+        public override bool ShouldSerializeValue(object component) {
+            return false;
+        }
+    }   
+}
+