private void CheckFloat()
{
CheckNumeric();
if (_conversion == ConversionAux.HexFloat)
CheckBadFlags(FormatFlags.Parentheses | FormatFlags.Group);
else if (_conversion == ConversionAux.Scientific)
CheckBadFlags(FormatFlags.Group);
else if (_conversion == ConversionAux.General)
CheckBadFlags(FormatFlags.Alternate);
}