Видео с ютуба Xamarin.forms Selected Item Is Null

Resolving the Issue of Selected Item is Null in Xamarin.Forms CollectionView

Troubleshooting the Value cannot be null parameter name: method Error in Xamarin.Forms

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Resolving Null Returned by ViewModel in Xamarin.Forms Code-Behind

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Change the Background Color of the Selected Item in Xamarin Forms

How to Resolve the CollectionView Custom Renderer Background Color Issue in Xamarin.Forms

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Resolving the Lost Item Background Color Issue in Xamarin Forms ListView

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