Avalonia/src/Avalonia.Controls/WindowState.cs

namespace Avalonia.Controls
{
    /// <summary>
    /// Defines the minimized/maximized state of a <see cref="Window"/>.
    /// </summary>
    public enum WindowState
    {
        /// <summary>
        /// The window is neither minimized or maximized.
        /// </summary>
        Normal,

        /// <summary>
        /// The window is minimized.
        /// </summary>
        Minimized,

        /// <summary>
        /// The window is maximized.
        /// </summary>
        Maximized,

        /// <summary>
        /// The window is fullscreen.
        /// </summary>
        FullScreen,
    }
}