// Overrides the ConvertFrom method of TypeConverter.
 public override object ConvertFrom(ITypeDescriptorContext context,
                                    CultureInfo culture, object value)
 {
     if (value is string)
     {
         return(PersianDate.Parse(value as string));
     }
     if (value is DateTime)
     {
         return(new PersianDate((DateTime)value));
     }
     return(base.ConvertFrom(context, culture, value));
 }