'Migrations' does not exist in the namespace 'Microsoft.EntityFrameworkCore'

I'm doing a ASP.NET Core project.
I've installed `Microsoft.EntityFrameworkCore` and `Microsoft.EntityFrameworkCore.Tools` NuGet packages.

I ran `Add-Migration InitialCreate` command,
Which created `Migrations` folder and `20180905180349_InitialCreate.cs` file.

But it says

> The type or namespace name 'Migrations' does not exist in the
> namespace 'Microsoft.EntityFrameworkCore' (are you missing an assembly
> reference?)

What is the cause of this error. Do i need to install any other package ?

Ok, I will show you the minimal setup required for EF Core + Migrations:

You will need to install Microsoft.EntityFramework.Core, but it is better that instead of that package you first install a EF Core provider for the database you will use. Then that EF Core provider will pull in all the required dependencies ( including Microsoft.EntityFramework.Core ) .

So (for example) for SQLServer db, in the Package Manager Console I will install:

1. **Install-Package Microsoft.EntityFrameworkCore.SqlServer**

2. **Install-Package Microsoft.EntityFrameworkCore.Tools** (for powershell commands)

3. **Install-Package Microsoft.EntityFrameworkCore.Design** (contains migrations engine - and **important** note this package has to be **inside executable project**)

And that's it.

I faced a similar issue and found that I haven't installed `Microsoft.EntityFrameworkCore.SqlServer`. Initially, I have installed only `Microsoft.EntityFrameworkCore` and `Microsoft.EntityFrameworkCore.Tools`.

After installing `Microsoft.EntityFrameworkCore.SqlServer` problem gets resolved

Including "Microsoft.EntityFrameworkCore.Design" was the answer to my problem.