XNA是基于DirectX的3D游戏开发环境。XNA Game Studio Express 中将包含以 .NET Framework 2.0 为基础、并加入游戏应用所需之函式库所构成的 XNA Framework 由一系列工具所构成、让开发者能以更简易的方式将 3D 内容整合到游戏中的 -XNA is DirectX-based 3D game development environment. XNA Game Studio Express will be included to. NET Framework 2.0-based, and join the XNA Framework of gaming applications required libraries　constituted by a series of tools that allow developers to more simple way of 3D content integrated into the game