ConvertToString()
{
AssertValid();
// Use string concatenation.
IFormatProvider oInvariantCulture = CultureInfo.InvariantCulture;
return (String.Join(PerWorkbookSettings.FieldSeparatorString,
new String [] {
base.ConvertToString(),
m_dDestinationNumber1.ToString(oInvariantCulture),
m_dDestinationNumber2.ToString(oInvariantCulture),
m_bLogsUsed.ToString(oInvariantCulture),
} ) );
}