namespace MauiApp1;

public partial class MainPage : ContentPage

{

    int count = 0;

    public MainPage()

    {

        InitializeComponent();

    }

    private async void OnCounterClicked(object sender, EventArgs e)

    {

        var shot = await TakeScreenshotAsync();

        img1.Source = shot;

    }

    public async Task<ImageSource> TakeScreenshotAsync()

    {

        if (Screenshot.Default.IsCaptureSupported)

        {

            IScreenshotResult screen = await Screenshot.Default.CaptureAsync();

            Stream stream = await screen.OpenReadAsync();

            var x = ImageSource.FromStream(() => stream);

            return x;

        }

        return null;

    }

}

<?xml version="1.0" encoding="utf-8" ?>

<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"

             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"

             x:Class="MauiApp1.MainPage">

    <ScrollView>

        <VerticalStackLayout

            Spacing="25"

            Padding="30,0"

            VerticalOptions="Center">

            <Button

                x:Name="CounterBtn"

                Text="ScreenShot"

                SemanticProperties.Hint="Counts the number of times you click"

                Clicked="OnCounterClicked"

                HorizontalOptions="Center" />

            <Image x:Name="img1" Source=""></Image>

        </VerticalStackLayout>

    </ScrollView>

</ContentPage>