public User(UserId userId, string ident, UserCategoryEnum category)
     : this(new[] {userId}, ident, category)
 {
 }
 public User(UserId userId, string ident, UserCategoryEnum category) : this(new[] { userId }, ident, category)
 {
 }
 public User(UserId[] userId, string ident, UserCategoryEnum category)
     : this(userId)
 {
     this.ident = string.IsNullOrEmpty(ident) ? "0" : ident;
     this.category = category;
 }
 public User(UserId[] userId, string ident, UserCategoryEnum category) : this(userId)
 {
     this.ident    = string.IsNullOrEmpty(ident) ? "0" : ident;
     this.category = category;
 }