I'm uploading documents and I want to do two things.

1. Only upload .doc files
2. I'm applying the Session.SessionID to the Filename to give it
uniqueness. Is this approach logical?

<script language="c#" runat="server">
void UploadFile_Clicked(Object src, EventArgs E)
{
string FileName;
string uploadDirectory = "C:\\Resumes\\";

FileName=uploadFile.PostedFile.FileName;
FileName=Path.GetFileName(FileName);

//restricting users to only upload .doc files.
uploadFile.PostedFile.SaveAs(uploadDirectory + Session.SessionID
+FileName);

UploadFormPanel.Visible = false;
uploadedFileInfoPanel.Visible = true;

}
</script>