Errore Pomelo.EntityFrameworkCore.Mysql DBContextOptionsBuilder non contiene una definizione per UseMyQL

Ho appena installato Visual Studio 17 e voglio usare mysql come database per sviluppare una WebAPI.

Il mio csproj:

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

  <PropertyGroup>
    <TargetFramework>netcoreapp1.1</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <Folder Include="wwwroot\" />
  </ItemGroup>
  <ItemGroup>
    <PackageReference Include="Microsoft.ApplicationInsights.AspNetCore" Version="2.0.0" />
    <PackageReference Include="Microsoft.AspNetCore" Version="1.1.1" />
    <PackageReference Include="Microsoft.AspNetCore.Mvc" Version="1.1.2" />
    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="1.1.1" />
    <PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="1.1.1" />
    <PackageReference Include="Pomelo.EntityFrameworkCore.MySql" Version="1.1.1" />
  </ItemGroup>
  <ItemGroup>
    <DotNetCliToolReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Tools" Version="1.0.0" />
  </ItemGroup>

</Project>

Dal gestore di pacchetti NuGet ho installato Pomelo.EntityFrameworkCore.Mysql.

Il mio aspsettings.json:

{
  "ConnectionStrings": {
    "MysqlConnection": "server=localhost;userid=root;pwd=root;port=3306;database=aspnet;sslmode=none;"
  },
  "Logging": {
    "IncludeScopes": false,
    "LogLevel": {
      "Default": "Warning"
    }
  }
}

Nel mio strtup.cs all'interno di ConfigureServices () ho:

services.AddDbContext<WebAPIDataContext>(options =>
            {
                options.UseMySQL(Configuration.GetConnectionString("MysqlConnection")); }
            );
 services.AddMvc();
 services.AddScoped<IProfileRepository, ProfileRepository>();

Tuttavia, mi sta dando DBContextOptionsBuilder does not contain a definition for UseMyQL errore DBContextOptionsBuilder does not contain a definition for UseMyQL . Perché è così?