XML Validate against XSD Schema

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C#

XML

Hey guru's

Am trying to write a validate function in C#.
Here is what am trying to do.
Am getting XML from Webservices and am validate against XSD schema file.
But some how i missed something in code,so its not validate.
Please throw me some light.

public static bool validateXml(string strXml, string strXsdFilePath)
        {
            bool validity = false;

            try
            {
                //step 1: Read the XSD file and create xml schema object from it
                StreamReader xsdReader = new StreamReader(strXsdFilePath);
                XmlSchema schema = new XmlSchema();
                schema = XmlSchema.Read(xsdReader, new ValidationEventHandler(XSDValidationEventHandler));

                //step 2: Instantiate xml reader settings so that xml file
                //is actually read according to the configured settings
                XmlReaderSettings readerSettings = new XmlReaderSettings();
                readerSettings.ValidationType = ValidationType.Schema;
                readerSettings.Schemas.Add(schema);
                readerSettings.ValidationEventHandler += new ValidationEventHandler(XMLValidationEventHandler);

                //step 3: Read and validate xml file
                StringReader xmlReader = new StringReader(strXml);
                XmlReader objXmlReader = XmlReader.Create(xmlReader, readerSettings);
                while (objXmlReader.Read())
                { }

                //if at this point, then xml has been validated against the xsd file
                validity = true;
                //log the success
                log.Info("Successfule xml file validation");
            }
            catch (Exception error)
            {
                validity = false;
                // XML Validation failed
                log.Error( "XML validation failed:- ERROR MESSAGE: " + error.Message);
                
            }

            return validity;
        }

My XSD Schema File

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns="CRS_Test.dtd" xmlns:wmh="http://www.wmhelp.com/2003/eGenerator" elementformdefault="qualified" targetnamespace="CRS_Test.dtd">
  <xs:element name="TEST">
    <xs:complextype />
  </xs:element>
</xs:schema>

my XML File
<test> </test>

Thanks in Advance.