C# (CSharp) TrailDbContext примеры использования

Пример #1

 public DestinationController(TrailDbContext dbContext, IWebHostEnvironment hostEnvironment, UserManager <IdentityUser> userManager)
 {
     context            = dbContext;
     webHostEnvironment = hostEnvironment;
     _userManager       = userManager;
 }

Пример #2

 public TrailController(TrailDbContext dbContext)
 {
     context = dbContext;
 }