Thanks Anthony, but I'm still receiving an error.
Attached is where I encounter the error.
This is what I changed my above to after trying the example you gave me and implementing it as my own:
_RadComboBox CB_Boundary = myApp.Find.ByAutomationId<RadComboBox>(
The code behind for the xaml is the following :
sender, MSPWeb.GetAllBoundariesCompletedEventArgs e)
> temp = e.Result.ToList();
I can assume that the items are not loaded when selectItem is called.
The service is called to add to the combobox items, but for some reason, it doesn't see any of it.