Vista - Working with Grid using Avalon

Hi all,

Utilizing Avalon (C#),
See the attachement on the Grid being implemented.


- For each row added in (1),
+ Type value is displayed as text and
+ A selection for Name will be allowed for each specific type (i.e. if Type = 1 then
Name is allowed to be selected among A and B)
This can be done using <CollectionViewSource.GroupDescriptions>

- To implement the function of adding new item as in (2) where
+ it is allowed to select a Type value from the combo box and
+ the value for the Name combo box will be filtered appropriately against the Type
value selected (i.e. if Type selected = 1 then Name can be selected among A and B
only)

QUESTIONS:
1 - Do we have a built in property/method supported by Avalon (C#) to do this when
"GroupDescriptions" was already used for the added item in the grid like above? If
yes, what is it and how to use?
2 - Can anyone instruct me a good way to have the feature of (2) implemented?

Regards