Xamarin.AndroidX.ConstraintLayout
Xamarin.Android.Support.Constraint.Layout
Xamarin.AndroidX.ConstraintLayout.Solver
Xamarin.AndroidX.DataBinding.ViewBinding
Xamarin.AndroidX.Legacy.Support.Core.UI
Xamarin.AndroidX.Lifecycle.LiveData
Xamarin.Android.Support.Constraint.Layout
Xamarin.AndroidX.Legacy.Support.Core.UI
Xamarin.AndroidX.ConstraintLayout.Solver
Xamarin.AndroidX.Lifecycle.LiveData
Xamarin.AndroidX.DataBinding.ViewBinding
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent">
</androidx.constraintlayout.widget.ConstraintLayout>
https://www.c-sharpcorner.com/article/how-to-use-constraint-layout-in-xamarin-android/