Creating a computer game using C# is a complex process. Here are the basic steps:

1. **Conceptualize Your Game**: Start by coming up with a game concept. Decide on the game’s genre, storyline, gameplay mechanics, and other details.

2. **Choose a Game Engine**: Before you start, select a game engine. Popular choices include Unity, Unreal Engine, and Godot. Game engines streamline many aspects of game development, from graphics to sound.

3. **Set Up Your Development Environment**: Download and install your chosen game engine and use an integrated development environment (IDE) for coding. Visual Studio is a common choice for Unity development.

4. **Develop Core Gameplay Mechanics**: Build the core mechanics of your game, including character controls, enemies, objects, and other essential elements.

5. **Graphics and Artwork**: Create or acquire the graphics and artwork for your game. This includes graphic design, character design, and animations.

6. **Sound and Music**: Create or license sound effects and music for your game. Sound design and music significantly impact the player’s experience.

7. **Programming Your Game**: Program your game using C# or your chosen programming language. This involves coding character controls, enemies, game logic, scoring systems, and more.

8. **Testing and Debugging**: Continuously test your game and fix any bugs. Collect feedback from players and make improvements.

9. **Distribution and Marketing**: Plan a distribution strategy for your game on platforms such as the App Store, Google Play, Steam, etc.

10. **Community and Support**: Build an online community for your game and provide support to players. Continuously update your game based on feedback and reviews.

Game development is a complex and often team-based process. It may have a learning curve, and you might need a solid foundation in programming. Additionally, gaining skills in game programming, graphic design, and sound design can take time and effort. Online resources, educational materials, and courses are good starting points to learn game development.