Setting up C# and creating a basic resource

FiveM runs C# resources, not just Lua. Here's the deal: C# catches your mistakes before the server ever starts, your editor autocompletes everything, and you get the whole .NET toolbox for hard stuff like external API calls. This lesson builds a C# resource from nothing - the project files, the BaseScript class (the base class FiveM looks for to run your code), and how you call FiveM's built-in functions from C#.

You'll build: A FiveM resource written in C# that prints to console and responds to a command.
Time: ~30 minutes
You need: A local FiveM server, Visual Studio or VS Code, .NET SDK installed.
You'll learn: When C# makes sense over Lua, how to set up a C# resource project, the BaseScript lifecycle, and accessing FiveM natives from C#.

BEFORE YOU START

Build it

Create the C# project

A .NET class library ready for FiveM.

In your resources folder:

code

mkdir resources/qu_csharp_demo
cd resources/qu_csharp_demo
dotnet new classlib --framework netstandard2.1
dotnet add package CitizenFX.Core --version 1.0.*

Rename Class1.cs to ServerMain.cs, then add a second file ClientMain.cs for the client-side code. You will compile these into a server assembly and a client assembly.

Setting up C# and creating a basic resource

Build it

Create the C# project

Write the server script

Write the client script

Create the fxmanifest

Test the command and key press

Keep reading the full lesson