Module 1:
ObservationCollection<variableholder> lstVariable = new ObservationCollection<variableholder>();
</variableholder></variableholder>
Module 2:
public ObservableCollection<variableholder> variableData
{
get { return _varialbleholder ; }
set {_varialbleholder = value; }
}
</variableholder>
assign values to your lstvarialble in Module 1, when you want to pass it to Module 2 :
Moduel2.variableData = lstvariable;