I am attempting to compile a simple example code snippet that can be found here: but I haven't had any luck to get it to compile without errors.
First, I wrapped the code snippet on the web site into a main function like this:
using System;
using Microsoft.Extensions.Configuration;
internal class Program
{
static void Main(string[] args)
{
IConfigurationBuilder builder = new ConfigurationBuilder().AddJsonFile(".\appsettings.json", false, true);
IConfigurationRoot root = builder.Build();
Console.WriteLine($"Hello, { root["weather"] } world!");
}
}
My build script:
#!/bin/bash
mcs monotest.cs \
-r:/usr/lib/dotnet/sdk/8.0.103/Microsoft.Extensions.Configuration.dll \
-r:/usr/lib/dotnet/shared/Microsoft.AspNetCore.App/8.0.3/Microsoft.Extensions.Configuration.Abstractions.dll
However, I still get the following error: monotest.cs(10,41): error CS0012: The type System.Object is defined in an assembly that is not referenced. Consider adding a reference to assembly System.Runtime, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a
(The extra quotes in the error message were removed before pasting here.)
I searched for "System.Runtime" in /usr/lib and found several different instances of this file name:
$ find /usr/lib -name "System.Runtime.dll"
/usr/lib/dotnet/sdk/8.0.103/Microsoft/Microsoft.NET.Build.Extensions/net461/lib/System.Runtime.dll
/usr/lib/dotnet/shared/Microsoft.NETCore.App/8.0.3/System.Runtime.dll
/usr/lib/dotnet/packs/Microsoft.NETCore.App.Runtime.ubuntu.22.04-x64/8.0.3/runtimes/ubuntu.22.04-x64/lib/net8.0/System.Runtime.dll
/usr/lib/dotnet/packs/NETStandard.Library.Ref/2.1.0/ref/netstandard2.1/System.Runtime.dll
/usr/lib/dotnet/packs/Microsoft.NETCore.App.Ref/8.0.3/ref/net8.0/System.Runtime.dll
/usr/lib/mono/4.5-api/Facades/System.Runtime.dll
/usr/lib/mono/4.7.1-api/Facades/System.Runtime.dll
/usr/lib/mono/4.6.1-api/Facades/System.Runtime.dll
/usr/lib/mono/4.7-api/Facades/System.Runtime.dll
/usr/lib/mono/4.6.2-api/Facades/System.Runtime.dll
/usr/lib/mono/4.5.1-api/Facades/System.Runtime.dll
/usr/lib/mono/4.5.2-api/Facades/System.Runtime.dll
/usr/lib/mono/4.6-api/Facades/System.Runtime.dll
/usr/lib/mono/4.5/Facades/System.Runtime.dll
/usr/lib/mono/4.8-api/Facades/System.Runtime.dll
/usr/lib/mono/4.7.2-api/Facades/System.Runtime.dll
I have no idea which one of these to add to my script. I tried a few of these but they just causes yet more errors like: error CS1070: The type System.Object has been forwarded to an assembly that is not referenced. Consider adding a reference to assembly System.Private.CoreLib... etc.
Maybe I need a whole shitload more of these with just the right combo but I was hoping someone would know the answer so I wouldn't have to try them all.
I just want to know if anyone else has tried something like this.
My OS:
$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 22.04.4 LTS
Release: 22.04
Codename: jammy
mono version:
$ mono --version
Mono JIT compiler version 6.8.0.105 (Debian 6.8.0.105+dfsg-3.2 Wed Jun 30 05:34:49 UTC 2021)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
TLS: __thread
SIGSEGV: altstack
Notifications: epoll
Architecture: amd64
Disabled: none
Misc: softdebug
Interpreter: yes
LLVM: supported, not enabled.
Suspend: hybrid
GC: sgen (concurrent by default)
BTW, if anyone wants to ask "what are you trying to do", here is the answer: nothing specific, I'm just trying to learn something. I saw some code similar to this on a learning web site but I didn't want to go through the hassle of signing up for a Microsoft account just so that I could download Visual Studio Community Edition and run it on my Windows box.
Thanks in advance!
Barring any further information, I believe the right answer is: "Mono is not maintained... use VS Code. Please refer to comments following original question." Switching to a different framework solved my issue. Thanks to @Lex Li for sending me in the right direction.