Hi,
You can get the file from directory you have saved the file.
Since it was last modified file irrespective of name.
you can get the file using last modified in that directory and attach same in your mail.
To get latest file from your directory write below code:
directory.GetFiles("C:\Users\rkolli\Downloads",“Employee.xls”,searchoption.AllDirectories).orderbydescending(function(f)f.creationtime).first()