我安装了 .NET core 3.0 SDK 并使用 .NET 创建了一个控制台应用程序dotnet new console
。这是项目文件。
<Project Sdk="Microsoft.NET.Sdk">
<PropertyGroup>
<OutputType>Exe</OutputType>
<TargetFramework>netcoreapp3.0</TargetFramework>
</PropertyGroup>
</Project>
该应用程序成功运行dotnet run
。当我在 Visual Studio Code 中打开它时,包括Program
、void
、string
在内的所有类型Console
都带有下划线,表示错误。错误总是一样的。此示例显示string
错误
Predefined type 'System.String' is not defined or imported (CS0518) [myproject]
我试过了:
dotnet clean
和dotnet restore
/dotnet build
- 手动删除
bin
,obj
和.vscode
恢复 - 从 vscode 本身恢复
- 安装了最新版本的 C# 扩展和 VS Code
请注意,.netcoreapp2.2
应用程序可以正常打开。
以下是一些环境信息:
$ code --version
1.38.1
b37e54c98e1a74ba89e03073e5a3761284e3ffb0
x64
$ dotnet --info
.NET Core SDK (reflecting any global.json):
Version: 3.0.100
Commit: 04339c3a26
Runtime Environment:
OS Name: ubuntu
OS Version: 19.04
OS Platform: Linux
RID: ubuntu.19.04-x64
Base Path: /usr/share/dotnet/sdk/3.0.100/
Host (useful for support):
Version: 3.0.0
Commit: 95a0a61858
.NET Core SDKs installed:
2.2.402 [/usr/share/dotnet/sdk]
3.0.100 [/usr/share/dotnet/sdk]
.NET Core runtimes installed:
Microsoft.AspNetCore.All 2.2.7 [/usr/share/dotnet/shared/Microsoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.2.7 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.0.0 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 2.2.7 [/usr/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 3.0.0 [/usr/share/dotnet/shared/Microsoft.NETCore.App]
To install additional .NET Core runtimes or SDKs:
https://aka.ms/dotnet-download
# lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 19.04
Release: 19.04
Codename: disco