I have no objection, other than a weak one to pointless churn, if someone replaces a comparable Java example with a C## one. Adding another example though would be a problem as it would fail to add any value from the standpoint of this article (Java practice is largely comparable to C##). You seem to have little faith in WP's ability to maintain an article. You claim that code can't be kept valid, you claim that having one example leads to a plethora. What evidence do you have for this, or that they can't be pruned?