getting error while trying to get "Grade" for StudentId=1

I have below entities and database context class,

public class Grade
{
    public int Id { get; set; }
    public string GradeName { get; set; }

    public virtual ICollection<Student> Students { get; set; } = new HashSet<Student>();
}

public class Student
{
    public int Id { get; set; }
    public string StudentName { get; set; }
}



public class SchoolContext : DbContext
{
    public DbSet<Grade> Grades { get; set; }
    public DbSet<Student> Students { get; set; }

    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
    {
        optionsBuilder.UseSqlServer(@"Server=(localdb)\MSSQLLocalDB;Database=SchoolDB;Trusted_Connection=True;");
    }
}

Getting below error while executing below code, whats need to be done here. Thanks!

I'm looking for solution without adding Grade property in Student class

System.InvalidOperationException: 'The Include property lambda expression 'x => {from Student c in x.Students where ([c].Id == __studentId_0) select [c]}' is invalid. The expression should represent a property access: 't => t.MyProperty'. To target navigations declared on derived types, specify an explicitly typed lambda parameter of the target type, E.g. '(Derived d) => d.MyProperty'. For more information on including related data, see http://go.microsoft.com/fwlink/?LinkID=746393.'

static void Main(string[] args)
    {
        var studentId = 1;

        var context = new SchoolContext();
        var data = context.Grades.Include(x => x.Students.Where(c => c.Id == studentId)).SingleOrDefault();
    }