Saving a FixedDocument to an XPS file causes memory leak

Question

I have created a .NET Windows Service which performs certain actions and generates reports. These reports are XPS documents which I save in a certain directory.

Being fa

Answer 1

From this, it looks like you have to call .UpdateLayout() at least once to avoid memory leak

Answer 2

I eventually found an answer, which is two parts.

Firstly, after saving my XPS document to disk and closing/disposing the XpsDocument, I run the following line of code:

Dispatcher.CurrentDispatcher.Invoke(DispatcherPriority.SystemIdle, new DispatcherOperationCallback(delegate { return null; }), null);

This gets rid of all the Dispatcher objects hanging around in memory.

While the above sorts out most of the memory issues, I noticed there were still FixedPage objects along with other UI objects still in memory. Manually clearing out my FixedDcoument seems to get rid of them:

foreach (var fixedPage in FixedDocument.Pages.Select(pageContent => pageContent.Child)) {
   fixedPage.Children.Clear();
}