Install netcoredbg and after that the dotnet-sdk

Arch linux:

https://aur.archlinux.org/packages/netcoredbg

# i use picaur, but choose one of:  pacaur, pikaur, yay, aura, paru, aurman, ..?
picaur -S netcoredbg

sudo pacman -S dotnet-sdk-8.0

Install the vscode extension

https://open-vsx.org/extension/blipk/csharp

Download the vsix file from the latest release assets.

Open the command pallete (Ctrl+Shift+P) then run Extensions: Install from VSIX

After installation open your workspace/solution/project

Add: /.vscode/tasks.json

{
    "version": "2.0.0",
    "tasks": [ 
        {
            "label": "build",
            "command": "/usr/bin/dotnet",
            "type": "shell",
            "args": [
                "build",
                // Ask dotnet build to generate full paths for file names.
                "/property:GenerateFullPaths=true",
                // Do not generate summary otherwise it leads to duplicate errors in Problems panel
                "/consoleloggerparameters:NoSummary"
            ],
            "group": "build",
            "presentation": {
                "reveal": "silent"
            },
            "problemMatcher": "$msCompile"
        }
    ]
}

Add: /.vscode/launch.json (Replace ‘MyProject’ with your project name)

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "netcoredbg",
            "type": "coreclr",
            "request": "launch",
            "preLaunchTask": "build",
            "program": "${workspaceFolder}/MyProject/bin/Debug/net8.0/MyProject.dll",
            "args": [],
            "cwd": "${workspaceFolder}",
            "env": {
                "DOTNET_ENVIRONMENT": "Development"
            }
        }
    ]
}

Add global.json to ensure it finds the SDK version

{
  "sdk": {
    "rollForward": "latestMajor",
    "version": "8.0.0"
  }
}

981900cookie-checkDotNet debug on linux