format UTF-8 BOM by AX

    #File
    CommaTextIo      commaTextIo;
    FileIOPermission permission;
    CustTable        custTable;
    str              fileName = @"c:\test.csv";
    System.Text.Encoding encoding = new System.Text.UTF8Encoding(false);
    
    permission = new FileIOPermission(fileName,#io_write);
    permission.assert();
    commaTextIo = new CommaTextIo(fileName,#io_write, 65001);

    while select custTable
    {
        commaTextIo.write(custTable.AccountNum);
    }
    CodeAccessPermission::revertAssert();
    commaTextIo = null;
    
    //save CSV without BOM
    new InteropPermission(InteropKind::ClrInterop).assert();
    System.IO.File::WriteAllText(filename, System.IO.File::ReadAllText(filename), encoding);
    CodeAccessPermission::revertAssert();