} // Equals
// ----------------------------------------------------------------------
public override int GetHashCode()
{
return(HashTool.ComputeHashCode(GetType().GetHashCode(),
calendar,
yearBaseMonth,
firstDayOfWeek,
date1,
date2,
difference));
} // GetHashCode
} // Equals
// ----------------------------------------------------------------------
public override int GetHashCode()
{
return(HashTool.ComputeHashCode(GetType().GetHashCode(), duration));
} // GetHashCode