GameHelper.cs

using System.Reflection;
using Microsoft.Xna.Framework;

namespace MonoGame.Extended.VideoPlayback;

/// <summary>
/// Helper class for <see cref="Game"/>. Internal use only.
/// </summary>
internal static class GameHelper
{

    /// <summary>
    /// Gets the running <see cref="Game"/> instance. It depends on the property name and lifecycle of <see cref="Game"/>.
    /// </summary>
    /// <returns>The game instance.</returns>
    internal static Game? GetCurrentGame()
    {
        if (_gameInstanceProperty == null)
        {
            var t = typeof(Game);
            var instanceProp = t.GetProperty("Instance", BindingFlags.Static | BindingFlags.NonPublic);

            if (instanceProp == null)
            {
                return null;
            }

            _gameInstanceProperty = instanceProp;
        }

        var prop = _gameInstanceProperty;
        var instance = (Game?)prop.GetValue(null);

        return instance;
    }

    private static PropertyInfo? _gameInstanceProperty;

}