public class DataContextFactory<TContext> : IDisposable, IDataContextFactory<TContext> where TContext : DbContext, IContext
{

// разные штуки :))

public TContext Create()
        {
            return _context ?? (_context = CreateContext());
        }
}

public interface IDataContextFactory<out TContext> : IDataContextFactory, IDbContextFactory<TContext> where TContext : DbContext, IContext
    {
    }

    public interface IDataContextFactory
    {
        ILoggingService Logger { get; set; }

        ISerializer Serializer { get; set; }
    }

public static class Program
    {
        public class FakeContext : DbContext, IContext
        {
            public ISerializer Serializer { get; set; }
            public ILoggingService Logger { get; set; }
            public string ConnectionString { get; }
            public void MarkAsModified<TEntity>(TEntity instance) where TEntity : class
            {
                throw new System.NotImplementedException();
            }

            public IDbSet<TEntity> CreateSet<TEntity>() where TEntity : class
            {
                throw new System.NotImplementedException();
            }
        }

        public static void Main(string[] args)
        {
            var factory = new DataContextFactory<FakeContext>(string.Empty, () => new AssemblyHelper().GetDomainAssembly);
        }
    }