Not able to install Microsoft.EntityFrameworkCore from Nuget Package Manager

Question

I am trying to install Microsoft.EntityFrameworkCore in my ASP.NET Core Web API project. But I get an error when I try to install:

Error Package restore failed. Rolling back package changes for 'RabbitMQ'.

Error NU1107 Version conflict detected for Microsoft.EntityFrameworkCore.Abstractions. Install/reference Microsoft.EntityFrameworkCore.Abstractions 3.1.0 directly to project RabbitMQ to resolve this issue. RabbitMQ -> Microsoft.EntityFrameworkCore 3.1.0 -> Microsoft.EntityFrameworkCore.Abstractions (>= 3.1.0) RabbitMQ -> Microsoft.AspNetCore.App 2.1.1 -> Microsoft.EntityFrameworkCore.Abstractions (>= 2.1.1 && < 2.2.0). RabbitMQ P:\\Users\\vivek.nuna\\RabbitMQ\\RabbitMQ\\RabbitMQ\\RabbitMQ.csproj 1

I have tried restarting VS, but it does not help.

VS 2017 version 15.8.6

CS Proj file.

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

  <PropertyGroup>
    <TargetFramework>netcoreapp2.1</TargetFramework>
  </PropertyGroup>

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

  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.App" />
    <PackageReference Include="RabbitMQ.Client" Version="5.1.2" />
    <PackageReference Include="Swashbuckle.AspNetCore" Version="4.0.1" />
  </ItemGroup>

</Project>

Although I am able to install it in .Net Core console application the same machine.

Answer 1

您应该安装 Microsoft.EntityFrameworkCore 2.1.11 版本