Why WriteAllText Method Saves XML with special Characters?

When saving the XML string as a file, I get a wrong output XML with special characters. The "<" and ">" tags are replace with < and > respectively.

XML String:

<string xmlns="http://smartpark.com/">
  <DocumentElement> 
    <SpaceInfo> 
      <R_Numb>490</R_Numb> 
      <FirstName>Michael</FirstName> 
      <LastName>Jones</LastName> 
      <Unit>311</Unit> 
      <Type>RG</Type> 
      <Location>FLOOR 1</Location> 
      <Feature>C</Feature> 
      <Space>100</Space> 
      <Status>Assigned</Status> 
      <DateAssigned>2014-09-24T00:00:00-05:00</DateAssigned> 
    </SpaceInfo> 
  </DocumentElement>
</string>

Saving Method:

System.IO.File.WriteAllText(Server.MapPath("testing.xml"), urlText,Encoding.UTF8);