Hi,
Sometime between the official 5.0.55.0 and the dev build 5.0.93.0, a change was introduced that leads to the following error:
Exception: InvalidOperationException, Collection was modified; enumeration operation may not execute
Attached is a sample application that demonstrates this problem. Point the references to 5.0.93.0 and run.
Then, click the refresh button, then, right away, click the Add Data button.
-Rod