CNA vs Alternatives

Choosing between CNA, FNA, MonoGame, and original XNA 4.0

Overview

The XNA 4.0 API has three meaningful successors: FNA, MonoGame, and now CNA. All three preserve the familiar XNA programming model, but each occupies a different niche. FNA is the most faithful managed reimplementation and the right choice for shipping existing C# XNA games. MonoGame extends XNA toward modern commercial development with broad console support and a large community. CNA is the only C++ reimplementation — it targets developers who want the XNA design without a managed runtime, who need a native foundation for an engine, or who are building Linux-first and WASM-first projects.

The original XNA 4.0 is discontinued (last update 2014) and runs only on Windows with .NET 4.0. It remains relevant only for projects still in maintenance on that exact stack.

Feature comparison

When to choose each

Choose CNA when…

• Your codebase is in C++ and you want XNA-style structure without switching languages.
• You need a native binary with no managed runtime, GC pauses, or JIT warm-up.
• You are doing engine research or building a higher-level engine on a stable XNA-shaped API.
• Linux-first or Web (WASM) deployment is a primary goal.
• You are already familiar with XNA and want that API in C++23.
• You value a large source-auditable test inventory and are prepared to run the exact renderer/platform configuration you ship.
• Your content and graphics needs fit the capability boundaries of a renderer you have verified.

Do not choose CNA when…

• You are shipping a commercial title on a schedule — FNA and MonoGame have a decade of production use behind them and CNA does not.
• Your game ships effects in a format the selected renderer cannot consume and you cannot migrate or rebuild them.
• You need a platform or graphics capability that alpha.1 does not verify for your chosen configuration.
• You need stable pre-1.0 API/ABI guarantees or production support today.

Choose FNA when…

• You have an existing C# game that shipped on XNA and need the closest drop-in replacement.
• Binary compatibility with XNA 4.0.4 assemblies is required.
• You want the most complete and battle-tested managed XNA reimplementation available.
• You need XNB content pipeline compatibility for existing asset workflows.

Choose MonoGame when…

• You are starting a new commercial C# game and want a large, active community behind you.
• Broad console support (Switch, PlayStation, Xbox) is on your roadmap.
• You want to use the MGCB content build pipeline and the MonoGame ecosystem of tools.
• Long-term community maintenance and third-party tutorials matter to your team.

Stick with original XNA 4.0 when…

• You are maintaining a very old project that must stay on .NET 4.0 on Windows.
• Migrating to any other framework is out of scope.
• Note: no new projects should target original XNA. Microsoft discontinued it in 2014 and it is not available for modern Windows without compatibility shims.

C++ vs C# API differences

CNA maps the XNA 4.0 API as faithfully as C++23 allows. The core patterns are the same, but C++ syntax requires some adjustments.

Code comparison: LoadContent and Draw

The following side-by-side example shows the same LoadContent + Draw pattern in XNA C# and in CNA C++23. The structure is deliberately identical; only language-level syntax differs.

// C# — XNA / MonoGame / FNA
Texture2D playerTexture;
SpriteBatch spriteBatch;

protected override void LoadContent()
{
    spriteBatch = new SpriteBatch(GraphicsDevice);
    playerTexture = Content.Load<Texture2D>("player");
}

protected override void Draw(GameTime gameTime)
{
    GraphicsDevice.Clear(Color.CornflowerBlue);

    spriteBatch.Begin();
    spriteBatch.Draw(
        playerTexture,
        new Vector2(100, 100),
        Color.White);
    spriteBatch.End();

    base.Draw(gameTime);
}

// C++23 — CNA
std::unique_ptr<Texture2D> playerTexture;
std::unique_ptr<SpriteBatch> spriteBatch;

void LoadContent() override
{
    spriteBatch =
        std::make_unique<SpriteBatch>(graphicsDevice);
    playerTexture =
        content.Load<Texture2D>("player");
}

void Draw(GameTime gameTime) override
{
    graphicsDevice->Clear(Color::CornflowerBlue);

    spriteBatch->Begin();
    spriteBatch->Draw(
        *playerTexture,
        Vector2(100.0f, 100.0f),
        Color::White);
    spriteBatch->End();

    Game::Draw(gameTime);
}

Migration note

If you are considering porting an existing MonoGame or FNA project to CNA, see the dedicated Migration from MonoGame / FNA guide. It covers content loading (CNA reads .xnb where a reader is registered, and falls back to loose files otherwise), property-to-method renaming, and smart pointer ownership patterns. For the full per-namespace picture of what will and will not work, start at XNA Compatibility.