eRKa

var timeout = 600;
var optionsBuilder = new DbContextOptionsBuilder<InstituteContext>()
	.UseSqlServer(new SqlConnection(connectionString), opt =>
	{
		opt.CommandTimeout(timeout);
	});
	
using (var context = new InstituteContext (optionsBuilder.Options))
{
  // your code
}

var word = db.Words.Include(x => x.LearnDay).Where(p => p.Id == testId).FirstOrDefault();

public void ConfigureServices(IServiceCollection services)
{
	services.AddAuthorization(x => 
	{
		x.AddPolicy("RoleStartWith", policy => { 
				policy.RequireRole(roles.Where(r => r.StartsWith("ad")));
			});
	});
}

[Authorize(Policy = "RoleStartWith")]
public IActionResult Index()
{
	return View();
}

public class CustomAutorizeAttribute : AuthorizeAttribute
{
	private string _prefix;
	private string[] _roles;

	public CustomAutorizeAttribute(string prefix)
	{
		_prefix = prefix;
		_roles = base.Roles.Split(',').Select(x => x.Trim()).ToArray();
	}

	protected override bool AuthorizeCore(HttpContextBase httpContext)
	{
		return _roles.Where(x => x.StartsWith(_prefix)).Any(x => httpContext.User.IsInRole(x));
	}
}

[CustomAutorize(prefix = "ad")]
public IActionResult Index()
{
	return View();
}

public class VmWord
{
    public int Id { get; set; }
    public string Name { get; set; }
    public string Localization { get; set; }

    [NotMapped]
    public Dictionary<string, string> Localizations 
    {
        get { return JsonConvert.DeseriazeObject<Dictionary<string, string>>(Localization.ToList()); }
        set { Localization = JsonConvert.SerializeObject(value); }
    }
}

public class VmWord
{
    public int Id { get; set; }
    public string Name { get; set; }
    public virtual List<string> Localizations { get; set; }
}

public class Localization
{
    public int Id { get; set; }
    public string Key { get; set; }
    public string Value { get; set; }
    public virtual VmWord VmWord { get; set; }
}

bd.User.OrderBy(x => x.Id).ToList().FindIndex(x => x.Name == "Vasya");

this.Db.Entry(Phone).State = EntityState.Modified;
this.Db.SaveChanges();