Path.GetFileName(saveFileDialog1.FileName) As String

This crashes:

Dim filename As String = System.IO.Path.GetFileName(saveFileDialog1.FileName)
file.Save(filename)

This works fine:

Dim filename As String = System.IO.Path.GetFileName(saveFileDialog1.FileName)
Dim filename2 As String = "filename"
file.Save(filename2)

When the first crashes, however, and I check the string names in the output or "Autos", filename and filename2 match. What's the problem?