.NET/C# is fully platform agnostic and Linux is a great host system for development in C#. In fact a lot of software developed in C# (basically all of the cloud software) is hosted on Linux systems. As others pointed out Rider and VS Code are a very good choice on Linux.

Depending on your distro, you may have the .NET SDK in your packages already. Debian doesn't have it. I'm not sure about Mint. I use Ubuntu MATE and .NET 8 is available. Check with this:

apt search dotnet-sdk

If you see something like dotnet-sdk-8.0 in the list, this will install everything you need:

sudo apt install dotnet-sdk-8.0

If it's not available in the package repo, it's not difficult to install manually. Follow the instructions here: https://learn.microsoft.com/en-us/dotnet/core/install/linux?WT.mc_id=dotnet-35129-website#manual-installation

For my development environment, I use VS Code with the following extensions:

• C# Dev Kit (Microsoft) -- This provides the full development experience: intellisense, debugger, project management, etc.
• C# Extensions (JosKreativ) -- This provides handy helpers for scaffolding classes and other module types.
• Todo Tree (Gruntfuggly) -- Locates TODO comments in your code and displays them in a dedicated tree view.

Once you've installed the SDK along with VS Code and the associated extensions, getting started is as easy as:

dotnet new console -o HelloWorld
cd HelloWorld
code .

Oh no! What happened to mono?

VSCode probably? I use Mint myself, but I don't do C#. I know IntelliJ, VSCode, and Eclipse all work fine, I just don't know what's best for C#. I'm surprised Visual Studio doesn't work.

https://consulo.io/ (Basically a liberated jetbrains intellij/rider thing)