Xamarin forms layout initialisation issue - xamarin.android

Question

I'm getting the following errors with my code
LinearLayout selectMain = FindViewById<GridLayout>(Resource.Id.select);
Error CS0029 Cannot implicitly convert type 'Android.Widget.GridLayout' to 'Android.Widget.LinearLayout'
GridLayout inputMain = FindViewById<LinearLayout>(Resource.Id.input);
Error CS0029 Cannot implicitly convert type 'Android.Widget.LinearLayout' to 'Android.Widget.GridLayout'
this is confusing me because they are both the correct layout types, and if I swap the layout types in my code, it builds fine but when run it throws almost the same exemption.
protected override void OnCreate(Bundle savedInstanceState) //run on startup.
{
base.OnCreate(savedInstanceState);
Xamarin.Essentials.Platform.Init(this, savedInstanceState);
SetContentView(Resource.Layout.activity_main);
LinearLayout selectMain = FindViewById<GridLayout>(Resource.Id.select);
GridLayout inputMain = FindViewById<LinearLayout>(Resource.Id.input);
}
<GridLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:minWidth="25px"
android:minHeight="25px"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:columnCount="4"
android:rowCount="9"
android:id="#+id/input"
tools:gridSpec="1|8|#0093eeff|K:#ee8700ff:16,l:72,l:16,r|S:#83ee00ff:16,0,l:16,0,r">
</GridLayout>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/select">
</LinearLayout>

Answer 1

You have your types swapped.
LinearLayout selectMain = FindViewById<GridLayout>(Resource.Id.select);
GridLayout inputMain = FindViewById<LinearLayout>(Resource.Id.input);
it should be:
//FindViewById<LinearLayout>
LinearLayout selectMain = FindViewById<LinearLayout>(Resource.Id.select);
//FindViewById<GridLayout >
GridLayout inputMain = FindViewById<GridLayout>(Resource.Id.input);