Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Xml/System/Xml/Schema/XmlSchemaChoice.cs

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+//------------------------------------------------------------------------------
+// <copyright file="XmlSchemaChoice.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+// <owner current="true" primary="true">[....]</owner>                                                               
+//------------------------------------------------------------------------------
+
+namespace System.Xml.Schema {
+
+    using System.Collections;
+    using System.Xml.Serialization;
+
+    /// <include file='doc\XmlSchemaChoice.uex' path='docs/doc[@for="XmlSchemaChoice"]/*' />
+    /// <devdoc>
+    ///    <para>[To be supplied.]</para>
+    /// </devdoc>
+    public class XmlSchemaChoice : XmlSchemaGroupBase {
+        XmlSchemaObjectCollection items = new XmlSchemaObjectCollection();
+
+        /// <include file='doc\XmlSchemaChoice.uex' path='docs/doc[@for="XmlSchemaChoice.Items"]/*' />
+        /// <devdoc>
+        ///    <para>[To be supplied.]</para>
+        /// </devdoc>
+        [XmlElement("element", typeof(XmlSchemaElement)),
+         XmlElement("group", typeof(XmlSchemaGroupRef)),
+         XmlElement("choice", typeof(XmlSchemaChoice)),
+         XmlElement("sequence", typeof(XmlSchemaSequence)),
+         XmlElement("any", typeof(XmlSchemaAny))]
+        public override XmlSchemaObjectCollection Items {
+            get { return items; }
+        }
+
+        internal override bool IsEmpty {
+            get { return  base.IsEmpty /*|| items.Count == 0*/; }
+        }
+        
+        internal override void SetItems(XmlSchemaObjectCollection newItems) {
+            items = newItems;
+        }
+    }
+}