Rendering and updating a colormap

Rules of WPF:

❌ Avoid the WPF Designer to eliminate a category of confusing bugs
❌ Don't rely on Margin as the primary tool for layouts
❌ Avoid writing UserControls or subclassing to extend a default control -- use Behaviors instead (Microsoft.Xaml.Behaviors.Wpf)

✅ Write XAML by hand and autoformat with "Ctrl K,D" or XAML Styler
✅ Rely upon XAML Hot Reload to design your app's UI at runtime
✅ Use layout controls (Grid, DockPanel, etc) to support proper resizing
✅ Use data binding to eliminate glue code and state synchronization issues
✅ Use collection controls and DataTemplate to dynamically create lists of controls
✅ Learn MVVM to create maintainable apps
✅ Use the Dispatcher to update controls from non-UI threads
✅ WPF's default controls can be easily modernized via $wpfuilibs
✅ Include relevant XAML, code-behind, and ViewModel code for questions when possible

Rules of WPF:

❌ Avoid the WPF Designer to eliminate a category of confusing bugs
❌ Don't rely on Margin as the primary tool for layouts
❌ Avoid writing UserControls or subclassing to extend a default control -- use Behaviors instead (Microsoft.Xaml.Behaviors.Wpf)

✅ Write XAML by hand and autoformat with "Ctrl K,D" or XAML Styler
✅ Rely upon XAML Hot Reload to design your app's UI at runtime
✅ Use layout controls (Grid, DockPanel, etc) to support proper resizing
✅ Use data binding to eliminate glue code and state synchronization issues
✅ Use collection controls and DataTemplate to dynamically create lists of controls
✅ Learn MVVM to create maintainable apps
✅ Use the Dispatcher to update controls from non-UI threads
✅ WPF's default controls can be easily modernized via $wpfuilibs
✅ Include relevant XAML, code-behind, and ViewModel code for questions when possible

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition />
        <RowDefinition />
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition />
        <ColumnDefinition />
    </Grid.ColumnDefinitions>
</Grid>

<Grid>
    <Grid.RowDefinitions>
        <RowDefinition />
        <RowDefinition />
    </Grid.RowDefinitions>
    <Grid.ColumnDefinitions>
        <ColumnDefinition />
        <ColumnDefinition />
    </Grid.ColumnDefinitions>
</Grid>

if (!Bitmap!.TryLock(new System.Windows.Duration(TimeSpan.FromMilliseconds(500))))

if (!Bitmap!.TryLock(new System.Windows.Duration(TimeSpan.FromMilliseconds(500))))

string? expr = Console.ReadLine();
string[]? words = expr?.Split();

string? expr = Console.ReadLine();
string[]? words = expr?.Split();

string expr = Console.ReadLine()!;

string expr = Console.ReadLine()!;

string expr = Console.ReadLine() ?? throw new("Oh no! Got a null");

string expr = Console.ReadLine() ?? throw new("Oh no! Got a null");

if (Console.ReadLine() is { } validThing)
{
    ...
}

if (Console.ReadLine() is { } validThing)
{
    ...
}

if (!Bitmap?.TryLock(new System.Windows.Duration(TimeSpan.FromMilliseconds(500))))

if (!Bitmap?.TryLock(new System.Windows.Duration(TimeSpan.FromMilliseconds(500))))

public readonly struct Color
{
    public float R => _r;
    public float G => _g;
    public float B => _b;

    private float _r;
    private float _g;
    private float _b;

    public Color(float r = 0, float g = 0, float b = 0)
    {
        _r = r;
        _g = g;
        _b = b;
    }
}

public readonly struct Color
{
    public float R => _r;
    public float G => _g;
    public float B => _b;

    private float _r;
    private float _g;
    private float _b;

    public Color(float r = 0, float g = 0, float b = 0)
    {
        _r = r;
        _g = g;
        _b = b;
    }
}

public struct Color
    {
        private float _r;
        private float _g;
        private float _b;

        public float r => _r;
        public float g => _g;
        public float b => _b;

        public float this[int index] {
            get => index switch {
                0 => _r,
                1 => _g,
                2 => _b,
                _ => throw new ArgumentOutOfRangeException(nameof(index))
            };
            set => {
                switch(value) {
                    case 0:
                        _r = value; break;
                    case 1:
                        _g = value; break;
                    case 2:
                        _b = value; break;
                    default:
                        throw new ArgumentOutOfRangeException(nameof(value));
                }           
            }
        }

        public Color(float r = 0, float g = 0, float b = 0) {
            this._r = r;
            this._g = g;
            this._b = b;
        }
    }

public struct Color
    {
        private float _r;
        private float _g;
        private float _b;

        public float r => _r;
        public float g => _g;
        public float b => _b;

        public float this[int index] {
            get => index switch {
                0 => _r,
                1 => _g,
                2 => _b,
                _ => throw new ArgumentOutOfRangeException(nameof(index))
            };
            set => {
                switch(value) {
                    case 0:
                        _r = value; break;
                    case 1:
                        _g = value; break;
                    case 2:
                        _b = value; break;
                    default:
                        throw new ArgumentOutOfRangeException(nameof(value));
                }           
            }
        }

        public Color(float r = 0, float g = 0, float b = 0) {
            this._r = r;
            this._g = g;
            this._b = b;
        }
    }