SqliteDB to PostGRE Database seeding with C# ASP.NET Core 2.1 MVC

SeedData.cs

using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;

namespace SqliteToPostGre.Models
{
    public class SeedData
    {
        public static void Initialize(IServiceProvider serviceProvider)
        {
            IQueryable<Movie> Movies;
            
            using (var sqliteContext = new SqliteMovieContext(
                serviceProvider.GetRequiredService < DbContextOptions < SqliteMovieContext >>()))
            {
                Movies = from m in sqliteContext.Movies select m;
            }

            using (var postgreContext = new PostgreMovieContext(
                serviceProvider.GetRequiredService<DbContextOptions<PostgreMovieContext>>()))
            {
                foreach (var m in Movies)
                {
                    postgreContext.Movies.Add(m);
                    postgreContext.SaveChanges();
                }
            }
        }
    }
}

SqliteToPostGre.csproj

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

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

    <ItemGroup>
        <PackageReference Include="Microsoft.AspNetCore.App" />
        <PackageReference Include="Microsoft.AspNetCore.Razor.Design" Version="2.1.2" PrivateAssets="All" />
        <DotNetCliToolReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Tools" Version="2.0.4" />
        <PackageReference Include="Microsoft.EntityFrameworkCore" Version="2.1.4" />
        <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="2.1.4" />
        <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="2.1.4" />
        <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="2.1.4" />
        <PackageReference Include="Microsoft.VisualStudio.Web.CodeGeneration.Design" Version="2.1.6" />
        <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="2.1.2" />
        <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL.Design" Version="2.0.0-preview1" />
    </ItemGroup>

</Project>

Startup.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using SqliteToPostGre.Models;
using Microsoft.EntityFrameworkCore;

namespace SqliteToPostGre
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {
            services.Configure<CookiePolicyOptions>(options =>
            {
                // This lambda determines whether user consent for non-essential cookies is needed for a given request.
                options.CheckConsentNeeded = context => true;
                options.MinimumSameSitePolicy = SameSiteMode.None;
            });


            services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_1);

            services.AddDbContext<SqliteMovieContext>(options => options.UseSqlite("Data Source=Movies.db"));

            services.AddDbContext<PostgreMovieContext>(options =>
                options.UseNpgsql("Host=localhost;Database=testdb;Username=postgres;Password=jjj"));
            
            SeedData.Initialize(services.BuildServiceProvider());
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
                app.UseHsts();
            }

            app.UseHttpsRedirection();
            app.UseStaticFiles();
            app.UseCookiePolicy();

            app.UseMvc(routes =>
            {
                routes.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}/{id?}");
            });
        }
    }
}