There are three options to consider when displaying an entity selection:
1. Directly displaying the entity selection
   - Optimized and fast, but the columns displayed can only be attributes of the entity
2. Collection of Entity Values
   - Allows for columns other than entity attributes, but loses references to the entities
   - If you want to update values you need to send another query
3. Collection of Entity References
   - Allows for columns to be outside of the entity attributes and keeps the references to the entities,
      but is slower and more computationally expensive
   - These entities will stay in memory until all references are gone
    - Not reccomended for large selections

Option 1 Code:

Form.currentSelection:=ds.Contact.all()

Option 2 Code:

$col:=New collection $sel:=ds.Contact.all() $col:=$sel.toCollection() For each ($element; $col)    $element.new_property:="text" End for each Form.currentSelection:=$col

Option 3 Code:

C_OBJECT($sel; $entity; $obj) C_COLLECTION($col) $col:=New collection $sel:=ds.Contact.all() For each ($entity; $sel)    $obj:=New object    $obj.new_property:="text"    $obj.entity:=$entity    $col.push($obj) End for each Form.currentSelection:=$col

* For Option 3, the list box references the entity attributes through This.entity.attribute