EquillaConstants Class

The EquillaConstants object provides access to standard values used within Equilla scripts that may be needed within an extension object.
interface IEquillaConstants
{
    double InvalidValue { get; }
    DateTime InvalidDate { get; }
}
The InvalidValue constant can be used to test if a price parameter is set to the Equilla Invalid value.
The InvalidDate constant can be used to test if a date/time parameter is set to the Equilla Invalid value.
// Test if a price is valid
bool IsValidPrice( double price )
{
    EquillaConstants eqConsts = new EquillaConstantsClass();
    return price != eqConsts.InvalidValue;
}