如何修复在更新到Visual Studio 2019版本16.7.0之后出现的错误

我有一个使用Xamarin.Forms构建的移动应用程序

之后，我更新的Visual Studio从16.4.4至16.7.0

这些错误出现了

Assembly 'Xamarin.GooglePlayServices.Maps' is using '[assembly: Java.Interop.JavaLibraryReferenceAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author. MyApp.Android           
Assembly 'Xamarin.Android.Support.v7.CardView' is using '[assembly: Android.IncludeAndroidResourcesFromAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.   MyApp.Android           
Assembly 'Xamarin.GooglePlayServices.Base' is using '[assembly: Android.IncludeAndroidResourcesFromAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.   MyApp.Android           
Assembly 'Xamarin.Android.Support.v7.MediaRouter' is using '[assembly: Java.Interop.JavaLibraryReferenceAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.  MyApp.Android           
Assembly 'Xamarin.Android.Support.Vector.Drawable' is using '[assembly: Java.Interop.JavaLibraryReferenceAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author. MyApp.Android           
Assembly 'Xamarin.Android.Support.Design' is using '[assembly: Android.IncludeAndroidResourcesFromAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.    MyApp.Android           
Assembly 'Xamarin.GooglePlayServices.Gcm' is using '[assembly: Java.Interop.JavaLibraryReferenceAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.  MyApp.Android           
Assembly 'Xamarin.Android.Support.v7.AppCompat' is using '[assembly: Java.Interop.JavaLibraryReferenceAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.    MyApp.Android           
Assembly 'Xamarin.Android.Support.v7.RecyclerView' is using '[assembly: Java.Interop.JavaLibraryReferenceAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author. MyApp.Android           
Assembly 'Xamarin.GooglePlayServices.Basement' is using '[assembly: Android.IncludeAndroidResourcesFromAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.   MyApp.Android           
Assembly 'Xamarin.Android.Support.Animated.Vector.Drawable' is using '[assembly: Java.Interop.JavaLibraryReferenceAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.    MyApp.Android           
Assembly 'Xamarin.Android.Support.v7.AppCompat' is using '[assembly: Android.IncludeAndroidResourcesFromAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.  MyApp.Android           
Assembly 'Xamarin.GooglePlayServices.Maps' is using '[assembly: Android.IncludeAndroidResourcesFromAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.   MyApp.Android           
Assembly 'Xamarin.Android.Support.v4' is using '[assembly: Java.Interop.JavaLibraryReferenceAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.  MyApp.Android           
Assembly 'Xamarin.Android.Support.v7.CardView' is using '[assembly: Java.Interop.JavaLibraryReferenceAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author. MyApp.Android           
Assembly 'Xamarin.Android.Support.v4' is using '[assembly: Java.Interop.JavaLibraryReferenceAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.  MyApp.Android           
Assembly 'Xamarin.GooglePlayServices.Gcm' is using '[assembly: Android.IncludeAndroidResourcesFromAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.    MyApp.Android           
Assembly 'Xamarin.Android.Support.v7.RecyclerView' is using '[assembly: Android.IncludeAndroidResourcesFromAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.   MyApp.Android           
Assembly 'Xamarin.Android.Support.Design' is using '[assembly: Java.Interop.JavaLibraryReferenceAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.  MyApp.Android           
Assembly 'Xamarin.Android.Support.v7.MediaRouter' is using '[assembly: Java.Interop.JavaLibraryReferenceAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.  MyApp.Android           
Assembly 'Xamarin.Android.Support.Animated.Vector.Drawable' is using '[assembly: Android.IncludeAndroidResourcesFromAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.  MyApp.Android           
Assembly 'Xamarin.Android.Support.Vector.Drawable' is using '[assembly: Android.IncludeAndroidResourcesFromAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.   MyApp.Android           
Assembly 'Xamarin.GooglePlayServices.Base' is using '[assembly: Java.Interop.JavaLibraryReferenceAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author. MyApp.Android           
Assembly 'Xamarin.Android.Support.v7.MediaRouter' is using '[assembly: Android.IncludeAndroidResourcesFromAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.    MyApp.Android           
Assembly 'Xamarin.Android.Support.v4' is using '[assembly: Android.IncludeAndroidResourcesFromAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author.    MyApp.Android           
Assembly 'Xamarin.GooglePlayServices.Basement' is using '[assembly: Java.Interop.JavaLibraryReferenceAttribute]', which is no longer supported. Use a newer version of this NuGet package or notify the library author. MyApp.Android       

我尝试了什么？

1-我试图删除bin和obj文件夹以强制项目重建所有内容，但错误仍然出现

2-我试图降级到16.4.4并且错误消失了，但是我不想通过这种方式修复它，因为我想使用16.7.0中的这个新功能创建一个新的其他应用程序

那么，有没有办法解决这些错误而不降级到旧版本呢？

笔记：

Xamarin.Forms的版本是2.3