property ordering in the the grid

public class PropertySorter : ExpandableObjectConverter
{
#region Methods
public override bool GetPropertiesSupported(ITypeDescriptorContext context)
{
return true;
}

public override PropertyDescriptorCollection GetProperties(ITypeDescriptorContext context, object value, Attribute[] attributes)
{
//
// This override returns a list of properties in order
//
PropertyDescriptorCollection pdc = TypeDescriptor.GetProperties(value, attributes);
ArrayList orderedProperties = new ArrayList();
foreach (PropertyDescriptor pd in pdc)
{
Attribute attribute = pd.Attributes[typeof(PropertyOrderAttribute)];
if (attribute != null)
{
//
// If the attribute is found, then create an pair object to hold it
//
PropertyOrderAttribute poa = (PropertyOrderAttribute)attribute;
orderedProperties.Add(new PropertyOrderPair(pd.Name, poa.Order));
}
else
{
//
// If no order attribute is specifed then given it an order of 0
//
orderedProperties.Add(new PropertyOrderPair(pd.Name, 0));
}
}
//
// Perform the actual order using the value PropertyOrderPair classes
// implementation of IComparable to sort
//
orderedProperties.Sort();
//
// Build a string list of the ordered names
//
ArrayList propertyNames = new ArrayList();
foreach (PropertyOrderPair pop in orderedProperties)
{
propertyNames.Add(pop.Name);
}
//
// Pass in the ordered list for the PropertyDescriptorCollection to sort by
//
return pdc.Sort((string[])propertyNames.ToArray(typeof(string)));
}
#endregion
}

#region Helper Class - PropertyOrderAttribute
[AttributeUsage(AttributeTargets.Property)]
public class PropertyOrderAttribute : Attribute
{
//
// Simple attribute to allow the order of a property to be specified
//
private int _order;
public PropertyOrderAttribute(int order)
{
_order = order;
}

public int Order
{
get
{
return _order;
}
}
}
#endregion

#region Helper Class - PropertyOrderPair
public class PropertyOrderPair : IComparable
{
private int _order;
private string _name;
public string Name
{
get
{
return _name;
}
}

public PropertyOrderPair(string name, int order)
{
_order = order;
_name = name;
}

public int CompareTo(object obj)
{
//
// Sort the pair objects by ordering by order value
// Equal values get the same rank
//
int otherOrder = ((PropertyOrderPair)obj)._order;
if (otherOrder == _order)
{
//
// If order not specified, sort by name
//
string otherName = ((PropertyOrderPair)obj)._name;
return string.Compare(_name, otherName);
}
else if (otherOrder > _order)
{
return -1;
}
return 1;
}
}
#endregion

[TypeConverter(typeof(PropertySorter))]
public class Car
{

[PropertyOrder(1)]
public string Ferrari
{
get { }
set { }
}

[PropertyOrder(2)]
public string Benz
{
get { }
set { }
}

[PropertyOrder(3)]
public string Camry
{
get { }
set { }
}
}