I'd like to create a ProgressBar in XAML, but have it not be visible until I enable it in C# in response to something that takes a long time.
I've tried the properties IsVisible and IsLoaded, but the error says they're not writeable from XAML so when I run just the XAML, the progress bar is in motion (IsIndeterminate="true").
Is there a way to reserve space for, but not show, the ProgressBar in XAML? Or do I have to do it in C#? Would I set IsVisible to false after InitializeComponent?
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