c# - .NET Framework required, but I'm on a mac?

Question

I got this error when I tried to run my Visual Studio Code:

/usr/local/share/dotnet/sdk/5.0.101/Microsoft.Common.CurrentVersion.targets(1180,5): error MSB3644: The reference assemblies for .NETFramework,Version=v4.7.1 were not found. To resolve this, install the Developer Pack (SDK/Targeting Pack) for this framework version or retarget your application. You can download .NET Framework Developer Packs at https://aka.ms/msbuild/developerpacks [/Users/gtye/DxHero/Assembly-CSharp.csproj]

But I looked and it seems like .NET Frameworks are for Windows only? So I'm not sure what to do.

I saw another answer say to update Mono, which I did to no avail.

BTW even just writing something simple like this causes this error:

using System;

Console.WriteLine("Hello World");

Answer 1

等待大神答复