unable to read special character ( ° ) using streamreader

wonder if anyone knows the solution to my problem. currently, im using a streamreader
to read from a text file. some part of the codings are as below :
Dim filelocation As String = "d:\inetpub\wwwroot\batchtest.txt"
Dim fs As New FileStream(filelocation, FileMode.Open, FileAccess.Read)
Dim objreader As New StreamReader(fs)
While objreader.Peek() > -1
chr = Strings.Chr(objreader.Read)
response.write(chr)
end while
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
If the content of text file is: "Temperature","T","°C",
the output i get is only : "Temperature","T","C", (where the degree character
(°) is omitted and not read by the streamreader at all.Please help