Private alist As New ArrayList()
For i As Integer = 0 To FileList.Rows.Count - 1
            Dim cbb As CheckBox
            cbb = DirectCast(FileList.Rows(i).Cells(0).FindControl("RowLevelCheckBox"), CheckBox)
            If cbb.Checked = True Then
                alist.Add(i)
                Dim FilesDeleted As Boolean = False
                Dim MyFileInfo As New FileInfo(Server.MapPath("~/File/") + FileList.Rows(i).Cells(1).Text)
                If MyFileInfo.Exists = True Then
                    ClientScript.RegisterStartupScript(Me.GetType(), "AlertScript", "alert('File esiste.');", True)
                    MyFileInfo.Delete()
                    FilesDeleted = True
                Else
                    ClientScript.RegisterStartupScript(Me.GetType(), "AlertScript", "alert('File non esiste.');", True)
                End If
            End If
        Next