Razor Pages - Relationship One-To-Many

Question

I am trying to present a one-to-many relationship and errors always appear and I cannot move forward. If anyone can identify the errors, thank you very much. The final objective is to choose a record in the Villas table and to be able to associate records in another table. Thanks

using Microsoft.EntityFrameworkCore;

namespace LeisureVillas.RazorPages.Models
{
    public class VillaStatAContext : DbContext
    {
        public DbSet<StatementA> Tbl_Statement_Autos { get; set; }
        public DbSet<Villa> Tbl_Villas { get; set; }
        public VillaStatAContext(DbContextOptions<VillaStatAContext> options) : base(options)
        {
        }
        #region Required
        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
           modelBuilder.Entity<Villa>()
               .HasMany<StatementA>(s => s.StatementAs)
               .WithOne(p => p.Villas)
               .HasForeignKey(s => s.Stat_A_Villas);
            #endregion
        }
    }
}

using LeisureVillas.RazorPages.Models;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc.RazorPages;
using System.Collections.Generic;
using System.Linq;

namespace LeisureVillas.RazorPages.Pages
{
    [Authorize(Roles = "Manager")]
    public class VillaStatementA : PageModel
    {
        private readonly VillaStatAContext db = null;

        public List<Villa> Villas { get; set; }
        public List<StatementA> StatementAs { get; set; }

        public void OnGet()
        {
            this.Villas = (from e in db.Tbl_Villas orderby e.Vill_Name select e).ToList();
        }
    }
}

Answer 1

Use denpendency injection metioned in comment:

[Authorize(Roles = "Manager")]
public class VillaStatementA : PageModel
{
    private readonly VillaStatAContext _db;

    public VillaStatementA(VillaStatAContext db)
    {
        _db = db;
    }

    public List<Villa> Villas { get; set; }
    public List<StatementA> StatementAs { get; set; }

    public void OnGet()
    {
        this.Villas = (from e in db.Tbl_Villas orderby e.Vill_Name select e).ToList();
    }
}