WPF - Fields reloaded when change to high contrast

Question

I have this page in WPF .NET 5.0. When I change from OS current theme (light or dark) to High Contrast or from High Contrast to Light or Dark, the page is reloaded and the fields on the page are cleaned.
Is this a WPF limitation or a normal behavior when changing to High Contrast event?

Accepted Answer

According to documentation, the Loaded event might be re-raised as a result of system theme changes (and maybe for other reasons):

https://video2.skills-academy.com/en-us/dotnet/api/system.windows.frameworkelement.loaded

To skip the initialisation of the fields, try a boolean member:


bool loaded = false;

void Page_Loaded( object sender, RoutedEventArgs e )
{
    if( loaded ) return;
    loaded = true;

    // fill the fields...
}

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WPF - Fields reloaded when change to high contrast

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