BUG: Schema Object Model Does Not Recognize Valid Prefix Inside XPath Selector (317440)

MORE INFORMATION

Steps to Reproduce Behavior

1. Start Visual Studio .NET.
2. Create a new Windows application in Microsoft Visual C# .NET. Form1 is added to the project by default.
3. Verify that your project contains a reference to the System.Data namespace. If it does not, add a reference to this namespace.
4. Drag a Button control from the toolbox onto Form1. In the Properties window, change the Name property of the button to btnTest.
5. Use the using statement on the System.Xml and the System.Xml.Schema namespaces so that you are not required to qualify declarations in those namespaces later in your code. Add the following code to the "General Declarations" section of Form1:

   using System.Xml;
   using System.Xml.Schema;
   					

6. Add the following code in the btnTest_Click event:

   XmlSchema schema = new XmlSchema();
   schema.Namespaces.Add("r", "nsp");
   schema.Namespaces.Add("xs", "http://www.w3.org/2001/XMLSchema");
   schema.ElementFormDefault = XmlSchemaForm.Qualified;
   schema.TargetNamespace = "nsp";
   
   XmlSchemaElement element = new XmlSchemaElement();
   element.Name = "root";
   
   XmlSchemaKey element_key = new XmlSchemaKey();
   element_key.Name = "pNumKey";
   
   XmlSchemaXPath element_key_selector = new XmlSchemaXPath();
   element_key_selector.XPath = "r:part";
   element_key.Selector = element_key_selector;
   
   XmlSchemaXPath field = new XmlSchemaXPath();
   field.XPath = "@number";
   element_key.Fields.Add(field);
   element.Constraints.Add(element_key);
   
   schema.Items.Add(element);
   schema.Compile(new ValidationEventHandler(ValidationCallBack));
   schema.Write(Console.Out);
   					

7. Add the following code immediately after the btnTest_Click event:

   public void ValidationCallBack(object sender, ValidationEventArgs args) 
   {
       Console.WriteLine(args.Message);
       Console.WriteLine(args.Exception);
   }
   					

8. Save your project. On the Debug menu, click Start to run your project. You receive the following error message in the output window:
   The prefix 'r' in Xpath is unresolvable.