prs/prs.mobile/ConnectionTestApp/ConnectionTest/ConnectionTest/MainPage.xaml

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             x:Class="ConnectionTest.MainPage">

    <ScrollView>
        <StackLayout x:Name="stacklayout">
            <BoxView HeightRequest="80"/>
            <Frame Padding="2" BackgroundColor="LightYellow" Margin="2, 4, 2, 0" CornerRadius="5" BorderColor="DarkGray" HasShadow="False">
                <Grid>
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="auto"/>
                        <ColumnDefinition Width="*"/>
                        <ColumnDefinition Width="auto"/>
                    </Grid.ColumnDefinitions>
                    <Label Text="Add URL: " Grid.Column="0" VerticalOptions="Center" HorizontalOptions="Center" TextColor="DimGray"/>
                    <Entry x:Name="urlEnt" Grid.Column="1" HorizontalOptions="FillAndExpand" VerticalOptions="Center" TextColor="DimGray"/>
                    <Button Text="Add" Grid.Column="2" BackgroundColor="LightGreen" Clicked="AddButton_Clicked" VerticalOptions="Center"/>
                </Grid>
            </Frame>
        </StackLayout>
    </ScrollView>
</ContentPage>