How can I add a button inside var content page code-behind using Xamarin.Forms?

How can I add a button inside var content page in code-behind? I'm trying to make a list view of content pages each with its own button.

var content = new ContentPage
              {
                   Title = EntryTitulo.Text,
                   Content = new Label
                   {
                       Text = EntryText.Text,
                       VerticalOptions = LayoutOptions.CenterAndExpand,
                       HorizontalOptions = LayoutOptions.CenterAndExpand,                       
                    },

                    //I want to add a button here.... 
               };

A ContentPage can only have a single child. If you want to add multiple children, they need to be contained in a Layout container, like a StackLayout or a Grid

var label = new Label { ... };
var button = new Button { ... };

var layout = new StackLayout();

layout.Children.Add(label);
layout.Children.Add(button);

Content = layout;