public void CreateRole(string roleName, int? parentRoleId = null)
 {
     Role newRole = new Role() { Name = roleName, ParentRoleId = parentRoleId};
     DataContext db = new DataContext();
     db.Roles.Add(newRole);
     db.SaveChanges();
 }
 public override void CreateRole(string roleName)
 {
     Role newRole = new Role() { Name = roleName};
     DataContext db = new DataContext();
     db.Roles.Add(newRole);
     db.SaveChanges();
 }