Add remove partial view dynamically Prism - xamarin.forms

Question

I meant to use partial views in the past but never did. Now I do have a need but for some reasons I cannot get it right. I build a noddy project
2 Partial Views
Add and remove each partial views.
Problem.
I seem to be able to Add/remove View first time ,second time round I cant.
I guess I am missing something but not sure what?
I cannot seem to be able to add "x:Name" in code.
Any suggstions?
thanks
Xaml
<StackLayout x:Name="MyStacklayout" HorizontalOptions="Center" VerticalOptions="Center">
<Button x:Name="AddViewOne" Clicked="AddViewOne_OnClicked" Text="Add View One"></Button>
<Button x:Name="AddViewTwo" Clicked="AddViewTwo_OnClicked" Text="Add View Two"></Button>
<Button x:Name="RemoveViewOne" Clicked="RemoveViewOne_OnClicked" Text="Remove View One"></Button>
<Button x:Name="RemoveViewTwo" Clicked="RemoveViewTwo_OnClicked" Text="Remove View Two"></Button>
<views:PartialViewOne x:Name="ViewOne" mvvm:ViewModelLocator.AutowirePartialView="{x:Reference self}" />
<views:PartialViewTwo x:Name="ViewTwo" mvvm:ViewModelLocator.AutowirePartialView="{x:Reference self}" />
</StackLayout>
public partial class MainPage : ContentPage
{
public MainPage()
{
InitializeComponent();
}
private void AddViewOne_OnClicked(object sender, EventArgs e)
{
var myView = new PartialViewOne();
ViewModelLocator.SetAutowirePartialView(myView, this);
MyStacklayout.Children.Add(myView);
}
private void AddViewTwo_OnClicked(object sender, EventArgs e)
{
PartialViewTwo myView = new PartialViewTwo();
ViewModelLocator.SetAutowirePartialView(myView, this);
MyStacklayout.Children.Add(myView);
}
private void RemoveViewOne_OnClicked(object sender, EventArgs e)
{
var viewOneParent = (ViewOne.Parent as Layout<View>);
viewOneParent?.Children.Remove(ViewOne);
}
private void RemoveViewTwo_OnClicked(object sender, EventArgs e)
{
var viewOneParent = (ViewTwo.Parent as Layout<View>);
viewOneParent?.Children.Remove(ViewTwo);
}
}