CheckedListBox Memory Leak

Question

We are writing a diagnostic tool that needs to be run for many hours at a time, but we encounter a cryptic Memory Exception when we try to remove items from the CheckedListBox after the application has launched a couple of hours.

First we tried using checkedListBox.Items.Clear(); , and after some Googling we tried to do something like the following:

 for (int i = checkedListBox.Items.Count - 1; i >= 0; i--) { checkedListBox.Items.RemoveAt(i); } 

Unfortunately, the above did not solve the problem. I found this idea on the MSDN forums, but I can’t find a link for life again this morning. However, this forum said that someone was profiling their application and found a memory leak in CheckedListBox.Items.Clear() .

Does anyone know about functional work?

EDIT: FingerTheCat's answer temporarily resolved our issue, so now I will mark it as an answer. However, we started combing the code to try and find the real problem. Unfortunately, the current implementation is mostly spaghetti code, so it may be a few days before we find anything.

Answer 1

As it turned out, someone left some of the debugging code in the application, adding pretty detailed log data to the ArrayList , without clearing it. This code also added copies of ArrayList for itself. It is definitely not good to forget to endure.

Answer 2

The best thing to do, I think, is to call GarbageCollector at some points in your code. Just add GC.Collect (); next to some loops, and this should fix the problem with your memory.