How to validate an XML by Schema XSD?

I am trying to validate the values of a XML through a XSD file. I'm trying this way:

XmlDocument xmlDoc = new XmlDocument();
xmlDoc.Load(xmlReader);
ValidationEventHandler eventHandler = new ValidationEventHandler(ValidationEventHandler);
xmlDoc.Schemas.Add(schemaSet);
xmlDoc.Validate(eventHandler);

static void ValidationEventHandler(object sender, ValidationEventArgs e) 
{
    switch (e.Severity)
    {
        case XmlSeverityType.Error:
          Console.WriteLine("Error: {0}", e.Message);
        break;
        case XmlSeverityType.Warning:
          Console.WriteLine("Warning {0}", e.Message);
        break;
   }
}

But when I debug and run the xmlDoc.Validate(eventHandler) line, I get the following error:

  

The ' link ' element is not declared.

I have tried several places and I can not solve the problem; How can I resolve this problem?

XML