//Konstruktor
 public AdministrationController(UserManager <User> userManager, SignInManager <User> signManager,
                                 IHostingEnvironment hostingEnvironment, dbbuergerContext db)
 {
     this.userManager    = userManager;
     signInManager       = signManager;
     _hostingEnvironment = hostingEnvironment;
     this.db             = db;
 }
 public void Dispose()
 {
     if (db != null)
     {
         db.Dispose();
         db = null;
     }
 }
 //Konstrukor
 public HomeController(UserManager <User> userManager, SignInManager <User> signManager, dbbuergerContext db)
 {
     this.userManager = userManager;
     this.db          = db;
     signInManager    = signManager;
 }
 public RoleStore(dbbuergerContext db)
 {
     this.db = db;
 }
 public UserStore(dbbuergerContext db)
 {
     this.db = db;
 }
 //Konstruktor
 public FileController(dbbuergerContext db)
 {
     this.db = db;
 }