在 Ubuntu 20.04 VSCode 中尝试运行一个 Hello World 项目时出现 Omnisharp 问题

Question

我正在尝试让 .Net 和 VSCode 在 Ubuntu 20.04 上工作。 “dotnet 运行”命令运行程序正常，但是运行在 VSCode 中使用它会给我以下错误：

Starting OmniSharp server at 7/7/2020, 6:28:24 PM
    Target: /home/ivlatin2012/Projects/HelloDotnetCore

OmniSharp server started with Mono 6.8.0.
    Path: /home/ivlatin2012/.vscode/extensions/ms-dotnettools.csharp-1.22.1/.omnisharp/1.35.3/omnisharp/OmniSharp.exe
    PID: 14939

System.TypeLoadException: Could not load type of field 'McMaster.Extensions.CommandLineUtils.CommandLineApplication:_validationErrorHandler' (36) due to: Could not load file or assembly 'System.ComponentModel.DataAnnotations, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or one of its dependencies.
  at OmniSharp.Stdio.StdioCommandLineApplication..ctor () [0x00000] in <11f4106bfdfd41759d0a0dc35f30dcd7>:0 
  at OmniSharp.Stdio.Driver.Program+<>c__DisplayClass0_0.<Main>b__0 () [0x00006] in <be19315b4efc4538b70abd1dc15c63a1>:0 
  at OmniSharp.HostHelpers.Start (System.Func`1[TResult] action) [0x0001c] in <a3beccf5923c417282767eebc9bf25e1>:0

我运行宁

的Program.cs文件真的没什么

using System;

namespace HelloDotnetCore
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
        }
    }
}

launch.json 文件如下所示：

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [
        {
            "name": ".NET Core Attach",
            "type": "coreclr",
            "request": "attach",
            "processId": "${command:pickProcess}"
        },

        {
            "name": ".NET Core Launch (console)",
            "type": "coreclr",
            "request": "launch",
            "preLaunchTask": "build",
            "program": "${workspaceFolder}/bin/Debug/<target-framework>/<project-name.dll>",
            "args": [],
            "cwd": "${workspaceFolder}",
            "stopAtEntry": false,
            "console": "internalConsole"
        }
    
    ],

    ]
}

.csproj 文件如下所示

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <AutoGenerateBindingRedirects>true</AutoGenerateBindingRedirects>
    <GenerateBindingRedirectsOutputType>true</GenerateBindingRedirectsOutputType>
  </PropertyGroup>

</Project>

任何帮助将不胜感激。在过去的几年里，我一直远离任何 .Net，并且对 .Net Core 完全陌生。这是我试图遵循的 Pluralsight class 的一部分，但被 VSCode 和 Omnisharp 困住了。

Answer 1

我唯一能找到的就是这个

Github issue with Mono

您可以尝试添加设置："omnisharp.useGlobalMono": never 看看是否适合您。

Answer 2

对我来说，以下步骤有效：

转到 C# 扩展设置
设置 Omnisharp：使用全局单声道为“从不”

picture example

在 Ubuntu 20.04 VSCode 中尝试运行一个 Hello World 项目时出现 Omnisharp 问题

Omnisharp issue while trying to run a Hello World Project in VSCode on Ubuntu 20.04

linux

ubuntu

.net-core

visual-studio-code

omnisharp

在 Ubuntu 20.04 VSCode 中尝试 运行 一个 Hello World 项目时出现 Omnisharp 问题

Omnisharp issue while trying to run a Hello World Project in VSCode on Ubuntu 20.04

linux

ubuntu

.net-core

visual-studio-code

omnisharp

在 Ubuntu 20.04 VSCode 中尝试运行一个 Hello World 项目时出现 Omnisharp 问题