Loading an image from a database

This is my code to retreive a image from a database, for some reason the image.fromfile... keeps the file open after i load it, so i can''t delete it. If i can''t delete it (And because its still open) i can''t load hte next image from the database.

            If rcs.Fields("sig").Value Is System.DBNull.Value Then
                PictureBox1.Image = Nothing
                Exit Sub
            End If

            strStream.Write(rcs.Fields("sig").Value)


            strStream.SaveToFile("C:\sTemp.bmp", ADODB.SaveOptionsEnum.adSaveCreateOverWrite)
            strStream.Close()

            PictureBox1.Image = Image.FromFile("C:\sTemp.bmp")

            Kill("c:\stemp.bmp")

Its in vb.net, Please help!, Thanks.