How can I enrich database data to another database in EF core ? (SQL server)

using Microsoft.EntityFrameworkCore;
using System.Linq;

namespace Foo
{
    public class CopyData
    {
        public async void CopyAToB()
        {
            using var source = new FooSqliteContext("d:\\source.sqlite");
            using var target = new FooInMemoryContext();

            var sourceEntites = await source.Entites.ToArrayAsync();
            target.Entites.AddRange(sourceEntites);

            //DTO if needed...
            //var targetDto = sourceEntites.Select(sourceEntity => new FooContextBase.Entity() { Name = sourceEntity.Name });
            //target.Entites.AddRange(targetDto);

            target.SaveChanges();
        }
    }
    public abstract class FooContextBase : DbContext
    {
        public class Entity
        {
            public int Id { get; set; }
            public string Name { get; set; }
        }
        public DbSet<Entity> Entites { get; set; }
    }

    public class FooInMemoryContext : FooContextBase
    {
        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        => optionsBuilder.UseInMemoryDatabase("InMemoryDb");
    }
    public class FooSqliteContext : FooContextBase
    {
        public string SqLiteDbPath { get; set; }

        public FooSqliteContext(string dbPathAndFile)
        {
            SqLiteDbPath = dbPathAndFile;
            Database.EnsureCreated();
        }
        protected override void OnConfiguring(DbContextOptionsBuilder options)
            => options.UseSqlite($"Data Source={SqLiteDbPath}");
    }

}