BUG: XSD.exe generates cases that allow for multiple entries for all members of choice even though only one member is unbounded (816226)

MORE INFORMATION

Steps to Reproduce the Behavior

1. Start Microsoft Visual Studio .NET.
2. On the File menu, point to New, and then click Project.
3. Under Project Types, click Visual Basic Projects, or Visual C# Projects, and then under Templates, click Console Application.
4. In the Name text box, type MyTestConsoleApplication, and in the Location text box, type C:\, and then click OK.
5. Replace the existing code with the following code:

   Visual C# .NET Code

   using System;
   using System.Data;
   using System.Xml.Serialization;
   using System.IO;
   using System.Xml;
   using System.Xml.Schema;
   
   namespace MyTestConsoleApplication
   {
      class MyTestClass
      {
         [STAThread]
         static void Main(string[] args)
         {
            // Deserializing the data in XML Document to the object of type
            // of the class generated by xsd.exe for XML Schema
            Root myRootObj;
            FileStream fStream = new FileStream(@"C:\MyTestConsoleApplication\customers.xml", FileMode.Open);
            XmlSerializer mySerializer = new XmlSerializer(typeof(Root));
            myRootObj = (Root)mySerializer.Deserialize(fStream);
            mySerializer.Serialize(System.Console.OpenStandardOutput(), myRootObj);
            fStream.Close();
            Console.ReadLine();
         }
      }
   }
   

   Visual Basic .NET Code

   Imports System
   Imports System.Data
   Imports System.Xml.Serialization
   Imports System.IO
   Imports System.Xml
   Imports System.Xml.Schema
   
   Module Module1
   
      Sub Main()
         ' Deserializing the data in XML Document to the object of type
         ' of the class generated by xsd.exe for XML Schema
         Dim myRootObj As Root
         Dim fStream As New FileStream("C:\MyTestConsoleApplication\customers.xml", FileMode.Open)
         Dim mySerializer As New XmlSerializer(GetType(Root))
         myRootObj = mySerializer.Deserialize(fStream)
         mySerializer.Serialize(System.Console.OpenStandardOutput(), myRootObj)
         fStream.Close()
         Console.ReadLine()
      End Sub
   
   End Module
   

6. On the File menu, point to New, and then click File.
7. Under Categories, click General, and then under Templates, click XML Schema. Click Open.
8. Click the XML tab. Replace the existing code with the following XML Schema code:

   <?xml version="1.0" ?>
   <xs:schema id="Root" targetNamespace="http://tempuri.org/customer.xsd" xmlns:mstns="http://tempuri.org/customer.xsd" xmlns="http://tempuri.org/customer.xsd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" attributeFormDefault="qualified" elementFormDefault="qualified">
   	<xs:element name="Root" msdata:IsDataSet="true" msdata:EnforceConstraints="False">
   		<xs:complexType>
   			<xs:choice maxOccurs="unbounded">
   				<xs:element name="Customers" minOccurs="0" maxOccurs="unbounded">
   					<xs:complexType>
   						<xs:sequence>
   							<xs:choice minOccurs="0">
   								<xs:element name="workphone" type="xs:string" minOccurs="0" maxOccurs="unbounded" />
   								<xs:element name="homephone" type="xs:string" minOccurs="0" />
   								<xs:element name="cellphone" type="xs:string" minOccurs="0" />
   							</xs:choice>
   							<xs:element name="CustName" type="xs:string" minOccurs="0" />
   							<xs:element name="CustID" type="xs:string" />
   						</xs:sequence>
   					</xs:complexType>
   				</xs:element>
   			</xs:choice>
   		</xs:complexType>
   		<xs:key name="RootKey1">
   			<xs:selector xpath=".//mstns:Customers" />
   			<xs:field xpath="mstns:CustID" />
   		</xs:key>
   	</xs:element>
   </xs:schema>

9. On the File menu, click Save XMLSchema1 As.
10. Name the file C:\MyTestConsoleApplication\customers.xsd, and then click Save.
11. On the File menu, point to New, and then click File.
12. Under Categories, click General, and then under Templates, click XML File. Click Open.
13. Click the XML tab. Replace the existing code with the following XML code:

    <?xml version="1.0" encoding="utf-8" ?>
    <Root xmlns="http://tempuri.org/customer.xsd">
       <Customers>
          <cellphone>9887858</cellphone>
          <cellphone>4645645</cellphone>
          <homephone>8743857</homephone>
          <homephone>2345678</homephone>
          <CustName>3saqib2</CustName>
          <CustID>32</CustID>
       </Customers>
       <Customers>
          <homephone>8763857</homephone>
          <cellphone>9876543</cellphone>
          <CustName>Mian</CustName>
          <CustID>2</CustID>
       </Customers>
    </Root>

14. On the File menu, click Save XMLFile1 As.
15. Name the file C:\MyTestConsoleApplication\customers.xml, and then click Save.
16. Start Visual Studio .NET Command Prompt.
17. To generate a class file for the schema, type the following command at command prompt, and then press ENTER:
    

    To Generate Visual C# .NET Class

    xsd /c /l:cs /out:C:\MyTestConsoleApplication C:\MyTestConsoleApplication\customer.xsd

    To Generate Visual Basic .NET Class

    xsd /c /l:vb /out:C:\MyTestConsoleApplication C:\MyTestConsoleApplication\customer.xsd

18. In Solution Explorer, click the Show All Files icon.
19. Make sure that customer.cs, or customer.vb, is available in the list of files.
20. Right-click customer.cs, or customer.vb, and then click Include In Project.
21. On the Debug menu, click Start. You may notice multiple entries for cellphone and homephone in the Output window.
22. Press ENTER to close the console.
23. In XMLSchema1.xsd, locate the following choice element:

    							<xs:choice minOccurs="0">
    								<xs:element name="workphone" type="xs:string" minOccurs="0" maxOccurs="unbounded" />
    								<xs:element name="homephone" type="xs:string" minOccurs="0" />
    								<xs:element name="cellphone" type="xs:string" minOccurs="0" />
    							</xs:choice>

    Replace the choice element with the following choice elements:

    						   <xs:choice minOccurs="0">
    				  		      <xs:element name="workphone" type="xs:string" minOccurs="0" maxOccurs="unbounded" />
    							</xs:choice>
    							<xs:choice minOccurs="0">
    								<xs:element name="homephone" type="xs:string" minOccurs="0" />
    								<xs:element name="cellphone" type="xs:string" minOccurs="0" />
    							</xs:choice>
    

24. On the Debug menu, click Start.