CODEWITHSUNDEEP
c#winformsmemorymemory-managementmemory-leaks
ArMaN
ArMaN

Reputation: 2407

used memory doesn't decrease when forms close

I written a program in C# (WinForms) that has many forms. I show forms in this way:

Form_Sell frm = new Form_Sell();
frm.Show();

When I show many forms, used memory of my program increased and when I close all of new forms it doesn't decrease! (I check Used memory of my program in task manager) why it happens? and how can i do?

I used GC.Collect() in FormClosed Event of form. but it doesn't work(no effects on used memory)

I test it with empty forms. no controls and nothing. but when I show form memory increases and when I close it memory doesn't decrease!

Upvotes: 0

Views: 1214

Answers (2)

Jack Frost
Jack Frost

Reputation: 316

I think you need to use:

frm.Dispose();

by this, it will release used memory. Then run GC again and see what happens.

Upvotes: 0

Gjeltema
Gjeltema

Reputation: 4166

The Garbage Collector is non-deterministic. It will only free up memory when it feels pressure to do so. As such, just because you closed a Form doesn't mean it will immediately free the memory from it.

Therefore, just checking the Task Manager to see if the memory has been freed up for a single Form is not a good way to detect a memory leak.

To really, truly force the GC to get rid of the memory, a single GC.Collect() call isn't sufficient if there are items that hold native resources. Try this instead:

GC.Collect();
GC.WaitForPendingFinalizers();
GC.Collect();

Try that, and see if your memory changes.

Upvotes: 1

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