<Window xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:vm="using:AvaloniaRatingsControl.ViewModels"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:controls="using:AvaloniaRatingsControl.Controls"
        mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
        x:Class="AvaloniaRatingsControl.Views.MainWindow"
        x:CompileBindings="True"
        x:DataType="vm:MainWindowViewModel"
        Icon="/Assets/avalonia-logo.ico"
        Title="RatingControlSample">


    <Design.DataContext>
        <vm:MainWindowViewModel />
    </Design.DataContext>
    <controls:RatingControl NumberOfStars="5" Value="4"/>
</Window>

<Window xmlns="https://github.com/avaloniaui"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:vm="using:AvaloniaRatingsControl.ViewModels"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:controls="using:AvaloniaRatingsControl.Controls"
        mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
        x:Class="AvaloniaRatingsControl.Views.MainWindow"
        x:CompileBindings="True"
        x:DataType="vm:MainWindowViewModel"
        Icon="/Assets/avalonia-logo.ico"
        Title="RatingControlSample">


    <Design.DataContext>
        <vm:MainWindowViewModel />
    </Design.DataContext>
    <controls:RatingControl NumberOfStars="5" Value="4"/>
</Window>

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// method 3 using Lazy<int> and field initilizer
    private Lazy<int> tum = new Lazy<int>(() =>
    {
        Console.WriteLine("Calculating tum");
        return X + Y;
    });
    public int Tum
    {
        get
        {
            return tum.Value;
        }
    }

// method 3 using Lazy<int> and field initilizer
    private Lazy<int> tum = new Lazy<int>(() =>
    {
        Console.WriteLine("Calculating tum");
        return X + Y;
    });
    public int Tum
    {
        get
        {
            return tum.Value;
        }
    }

Foo f = new()
{
    X = 3,
    Y = 4
};

f.Dump();

class Foo
{
    public required int X { get; init; }
    public required int Y { get; init; }
    private int? sum = null;

    public int Sum
    {
        get
        {
            Console.WriteLine("Calculating Sum");
            sum ??= X + Y;
            return sum.Value;
        }
    }

    private Lazy<int> bum; // no longer needs to be int? which is nice
    public int Bum // getter no longer needs to worry about the logic behind the value of bum, which is nice
    {
        get
        {
            return bum.Value;
        }
    }

    public Foo() // constructor needed to let Bum know how to get the value of bum
    {
        bum = new Lazy<int>(() =>
        {
            Console.WriteLine("Calculating Bum");
            return X + Y;
        });
    }
}

Foo f = new()
{
    X = 3,
    Y = 4
};

f.Dump();

class Foo
{
    public required int X { get; init; }
    public required int Y { get; init; }
    private int? sum = null;

    public int Sum
    {
        get
        {
            Console.WriteLine("Calculating Sum");
            sum ??= X + Y;
            return sum.Value;
        }
    }

    private Lazy<int> bum; // no longer needs to be int? which is nice
    public int Bum // getter no longer needs to worry about the logic behind the value of bum, which is nice
    {
        get
        {
            return bum.Value;
        }
    }

    public Foo() // constructor needed to let Bum know how to get the value of bum
    {
        bum = new Lazy<int>(() =>
        {
            Console.WriteLine("Calculating Bum");
            return X + Y;
        });
    }
}