我正在尝试使.Net和VSCode在Ubuntu 20.04上运行。 “ dotnet run”命令确实可以正常运行该程序，但是在VSCode中运行它会给我以下错误：

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 

我正在运行的Program.cs文件确实没什么

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": "${command:pickProcess}"
        },{
            "name": ".NET Core Launch (console)","request": "launch","preLaunchTask": "build","program": "${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。在过去的几年中，我一直远离任何.Net，并且对.Net Core完全陌生。这是我要遵循的Pluralsight课程的一部分，但已经被VSCode和Omnisharp所困扰。