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Home/ Questions/Q 8553965
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Editorial Team
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Editorial Team
Asked: June 11, 20262026-06-11T14:46:27+00:00 2026-06-11T14:46:27+00:00

In Windows Presentation Foundation I am getting errors in the designer on this line:

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In Windows Presentation Foundation I am getting errors in the designer on this line:

<WindowsPresentation:GMapControl x:Name="MainMap" Zoom="13" MaxZoom="24" MinZoom="1" Margin="0,145,0,0" Height="Auto" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Width="Auto" />

However, the program runs just fine. I’m totally stumped. The designer also renders perfectly. It’s just an error in the errors list.

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  1. Editorial Team
    Editorial Team
    2026-06-11T14:46:29+00:00Added an answer on June 11, 2026 at 2:46 pm

    Well, already found the solution.

    It turns out that the amazing GMaps Control has a bug in which declaring Zoom in the WPF XAML syntax will raise a NullReferenceException. Removing this tag has fixed the issue:

    <WindowsPresentation:GMapControl x:Name="MainMap" CanDragMap="True"  MaxZoom="24" MinZoom="1"  Margin="0,145,0,0" Height="Auto" VerticalAlignment="Stretch" HorizontalAlignment="Stretch" Width="Auto" />
    

    I hope this helps someone with the same problem.

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