.net - 我的Visual Studio中缺少.NET Core 2.0

Question

因此，我已经安装了官方的.NET Core 2.0 SDK，当我在Visual Studio中时，出现很多错误，并且未列出目标框架:(

就像未安装.NET Core 2.0一样。



这是.csproj文件:

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

  <PropertyGroup>
    <TargetFramework>netcoreapp2.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <Folder Include="wwwroot\" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.0" />
  </ItemGroup>

</Project>

同样， dotnet --version返回 2.0.0
所以..我缺少一些安装工具吗？

编辑/更新:

这是我来自VS的系统信息:

Microsoft Visual Studio Community 2017 
Version 15.3.1
VisualStudio.15.Release/15.3.1+26730.8
Microsoft .NET Framework
Version 4.7.02046

Installed Version: Community

Visual Basic 2017   00369-60000-00001-AA912
Microsoft Visual Basic 2017

Visual C# 2017   00369-60000-00001-AA912
Microsoft Visual C# 2017

Application Insights Tools for Visual Studio Package   8.8.00712.1
Application Insights Tools for Visual Studio

ASP.NET and Web Tools 2017   15.0.30726.0
ASP.NET and Web Tools 2017

ASP.NET Core Razor Language Services   1.0
Provides languages services for ASP.NET Core Razor.

ASP.NET Template Engine 2017   15.0.30726.0
ASP.NET Template Engine 2017

ASP.NET Web Frameworks and Tools 2017   5.2.50601.0
For additional information, visit https://www.asp.net/

Azure App Service Tools v3.0.0   15.0.30728.0
Azure App Service Tools v3.0.0

... rest snipped.

Answer 1

请确保您使用Visual Studio 2017 Update 3(版本15.3、26730.01):Help-> About Microsoft Visual Studio