Using ExifReader to find tags property in Jpeg Image

Question

I am trying to get  tags property from my jpeg image as shown in picture.It's value is

 

<tx time=Tue Jul 21 10:20:04 2015> <ocrtime=Fri Jul 31 11:26:09 2015> <plate=4ARS123> <state=CA> <conf=873> <handle=4ARS123> <plateloc=906,744,1326,855>

 

I am trying to get plateloc tag from it and have tried following so far.I understand its one of properties of exiftags which will get me there.which one ? Please help
 

   using (ExifReader reader = new ExifReader( Server.MapPath( testimage.ImageUrl )) ){
     // Extract the tag data using the ExifTags enumeration
     string plateloc;
     if (reader.GetTagValue<string>(ExifTags.ExifVersion,
             out plateloc))
     {
      
     }
    }