The Bing maps WPF control was written for .NET client profile 4.0 and doesn't work well with newer frameworks. It's recommended to use the UWP map control and XAML islands for newer applications.
Bing Maps with .NET 6

Roger Schlueter
996
Reputation points
My application is desktop and wpf and uses Microsoft.Maps.MapControl.WPF. The application worked fine using .NET framework 4.8 but I have now upgraded it to .NET 6. Now adding children to a map layer now no longer actually draws the added child. Has something changed regarding Bing maps and .NET 6 that renders Bing map inoperable?
Accepted answer
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Duncan Lawler - MSFT 386 Reputation points Microsoft Employee
2022-08-31T23:42:02.613+00:00 0 additional answers
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The UWP map control can be used in a WPF application using XAML islands. The only other solution would be to embed a webview and use the web map control.