SamplePopup.xaml

<?xml version="1.0" encoding="utf-8" ?>
<base:Popup xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:base="clr-namespace:BottomSheet"
             x:Class="BottomSheet.SamplePopup"
             Title="SamplePopup">
    <Grid VerticalOptions="Center" HorizontalOptions="Center">
        <StackLayout x:Name="pgRoot" VerticalOptions="Center" HorizontalOptions="Center" BackgroundColor="Yellow" Padding="20" Spacing="20">

            <Label Padding="20" FontAttributes="Bold"
               FontSize="20"
            Text="POPUP !"
         />
                 <Label
                Text=".NET Multi-platform App UI"
                SemanticProperties.HeadingLevel="Level2"
                SemanticProperties.Description="Welcome to dot net Multi platform App U I"
                FontSize="18"
                HorizontalOptions="Center" />
            <Button Text="CLOSE" Clicked="Button_Clicked" />
        </StackLayout>
    </Grid>
</base:Popup>