EntityFrameworkCore does not exist in the namespace Microsoft

Question

I am trying to walk through this tutorial here.

https://learn.microsoft.com/en-us/aspnet/core/data/ef-mvc/intro

However after successfully installing EntityFrameworkCore in the package manager console using the command:

Install-Package Microsoft.EntityFrameworkCore.SqlServer

then running a dotnet restore successfully in the cmd, the project does not register EntityFrameworkCore. In the .csproj file you can see the line

<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="1.1.1" />

Unfortunately whenever I add a using statement with Microsoft.EntityFrameworkCore in a file I get the error mentioned in the title. Any idea why this might be happening?

Answer 1

I solved this problem by:

(1) Right clicking the project in the Solution Explorer

(2) Clicking unload project

(3) Click edit the .csproj and check if there is a Package Reference to EF

(4) Right clicking the project again in the Solution Explorer

(5) Then clicked reload project

Now it recognizes EntityFrameworkCore and there are no more build errors