一般ubuntu命令行操作为：

dotnet new console -n ConsoleApp01

cd ConsoleApp01

#dotnet add package OpenCvSharp4

#dotnet add package OpenCvSharp4.runtime.ubuntu.18.04-x64

# -- edit Program.cs --- #

dotnet run

但是我们打开vscode后一般点击code-runner无法运行C#代码，提示Scripts没找到错误，因此我们需要设置code-runner让它支持运行。

配置CodeRunner#

1️⃣ 首先在拓展商店下载这个插件，然后打开设置，打开setting.json

2️⃣ 找到code-runner.executorMap配置项，添加c#的配置如下（别忘了Ctrl+S保存）

"csharp":"csc $fileNameWithoutExt.cs && ./$fileNameWithoutExt.exe",

3️⃣ 返回cs文件，点击运行即可

上面是windows上设置方法，ubuntu18.04我是这么设置的

{
"editor.mouseWheelZoom": true,
"code-runner.runInTerminal": true,
"code-runner.saveFileBeforeRun": true,
"code-runner.executorMap": {
"javascript": "node",
"java": "cd $dir && javac $fileName && java $fileNameWithoutExt",
"c": "cd $dir && gcc $fileName -o $fileNameWithoutExt && $dir$fileNameWithoutExt",
"zig": "zig run",
"cpp": "cd $dir && g++ $fileName -o $fileNameWithoutExt && $dir$fileNameWithoutExt",
"objective-c": "cd $dir && gcc -framework Cocoa $fileName -o $fileNameWithoutExt && $dir$fileNameWithoutExt",
"php": "php",
"python": "python -u",
"perl": "perl",
"perl6": "perl6",
"ruby": "ruby",
"go": "go run",
"lua": "lua",
"groovy": "groovy",
"powershell": "powershell -ExecutionPolicy ByPass -File",
"bat": "cmd /c",
"shellscript": "bash",
"fsharp": "fsi",
"csharp": "dotnet run",
"vbscript": "cscript //Nologo",
"typescript": "ts-node",
"coffeescript": "coffee",
"scala": "scala",
"swift": "swift",
"julia": "julia",
"crystal": "crystal",
"ocaml": "ocaml",
"r": "Rscript",
"applescript": "osascript",
"clojure": "lein exec",
"haxe": "haxe --cwd $dirWithoutTrailingSlash --run $fileNameWithoutExt",
"rust": "cd $dir && rustc $fileName && $dir$fileNameWithoutExt",
"racket": "racket",
"scheme": "csi -script",
"ahk": "autohotkey",
"autoit": "autoit3",
"dart": "dart",
"pascal": "cd $dir && fpc $fileName && $dir$fileNameWithoutExt",
"d": "cd $dir && dmd $fileName && $dir$fileNameWithoutExt",
"haskell": "runghc",
"nim": "nim compile --verbosity:0 --hints:off --run",
"lisp": "sbcl --script",
"kit": "kitc --run",
"v": "v run",
"sass": "sass --style expanded",
"scss": "scss --style expanded",
"less": "cd $dir && lessc $fileName $fileNameWithoutExt.css",
"FortranFreeForm": "cd $dir && gfortran $fileName -o $fileNameWithoutExt && $dir$fileNameWithoutExt",
"fortran-modern": "cd $dir && gfortran $fileName -o $fileNameWithoutExt && $dir$fileNameWithoutExt",
"fortran_fixed-form": "cd $dir && gfortran $fileName -o $fileNameWithoutExt && $dir$fileNameWithoutExt",
"fortran": "cd $dir && gfortran $fileName -o $fileNameWithoutExt && $dir$fileNameWithoutExt",
"sml": "cd $dir && sml $fileName"
},
"debug.allowBreakpointsEverywhere": true,
"editor.codeLensFontFamily": "monospace",
"editor.fontFamily": "'monospace', 'monospace', monospace"
}

其中写dotnet run理论也支持windows。