VsCode Omnisharp不会加载以net5.0为目标的项目。针对较低版本SDK的项目似乎一切都很好。Omnisharp加载项目失败，出现以下错误：
"；找不到.NETFramework v5.0版本的引用程序集。若要解决此问题，请为此框架版本安装开发包(SDK/Targeting Pack(或重新确定应用程序的目标。您可以在以下位置下载.NET Framework开发包：https://aka.ms/msbuild/developerpacks">
据我所知；开发者包"；5.0，所以我不知道该怎么办。然而，Omnisharp似乎是唯一的问题。该项目将在没有错误的情况下生成和运行。我想这意味着MSBuild正在找到框架。Omnisharp的扩展版本是v1.23.8。
Omnisharp日志的相关部分和错误：
Starting OmniSharp server at 1/10/2021, 5:49:52 PM
Target: c:UsersUser NameDocumentsMyProjectCodetest3
OmniSharp server started.
Path: c:UsersUser Name.vscodeextensionsms-dotnettools.csharp-1.23.8.omnisharp1.37.6-beta.23OmniSharp.exe
PID: 7580
[info]: OmniSharp.Stdio.Host
Starting OmniSharp on Windows 6.2.9200.0 (x64)
[info]: OmniSharp.Services.DotNetCliService
DotNetPath set to dotnet
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
Located 2 MSBuild instance(s)
1: Visual Studio Community 2019 16.7.30406.217 - "C:Program Files (x86)Microsoft Visual Studio2019CommunityMSBuildCurrentBin"
2: StandAlone 16.8.0 - "c:UsersUser Name.vscodeextensionsms-dotnettools.csharp-1.23.8.omnisharp1.37.6-beta.23.msbuildCurrentBin"
[info]: OmniSharp.MSBuild.Discovery.MSBuildLocator
Registered MSBuild instance: Visual Studio Community 2019 16.7.30406.217 - "C:Program Files (x86)Microsoft Visual Studio2019CommunityMSBuildCurrentBin"
...
[fail]: OmniSharp.MSBuild.ProjectLoader
The reference assemblies for .NETFramework,Version=v5.0 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
[warn]: OmniSharp.MSBuild.ProjectManager
Failed to load project file 'c:UsersUser NameDocumentsMyProjectCodetest3test.webtest.web.csproj'.
这是我的网络——信息输出：
.NET SDK (reflecting any global.json):
Version: 5.0.100
Commit: 5044b93829
Runtime Environment:
OS Name: Windows
OS Version: 10.0.18363
OS Platform: Windows
RID: win10-x64
Base Path: C:Program Filesdotnetsdk5.0.100
Host (useful for support):
Version: 5.0.0
Commit: cf258a14b7
.NET SDKs installed:
2.2.104 [C:Program Filesdotnetsdk]
2.2.401 [C:Program Filesdotnetsdk]
3.1.201 [C:Program Filesdotnetsdk]
3.1.401 [C:Program Filesdotnetsdk]
5.0.100 [C:Program Filesdotnetsdk]
.NET runtimes installed:
Microsoft.AspNetCore.All 2.2.2 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.2.5 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.All]
Microsoft.AspNetCore.All 2.2.6 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.2.2 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.2.5 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.AspNetCore.App 2.2.6 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.0.0 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.3 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.7 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.AspNetCore.App 5.0.0 [C:Program FilesdotnetsharedMicrosoft.AspNetCore.App]
Microsoft.NETCore.App 2.2.2 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.NETCore.App 2.2.5 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.NETCore.App 2.2.6 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.NETCore.App 3.0.0 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.NETCore.App 3.1.3 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.NETCore.App 3.1.7 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.NETCore.App 5.0.0 [C:Program FilesdotnetsharedMicrosoft.NETCore.App]
Microsoft.WindowsDesktop.App 3.1.3 [C:Program FilesdotnetsharedMicrosoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 3.1.7 [C:Program FilesdotnetsharedMicrosoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 5.0.0 [C:Program FilesdotnetsharedMicrosoft.WindowsDesktop.App]
您的电脑上安装了Visual Studio，版本为16.7，OmniSharp正在尝试使用其构建工具来启动，但它不是支持.NET 5.0的16.8。只要将VS更新到最新版本，everithinng就会如您所愿。