c# - does not contain a constructor that takes '1' arguments -

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i've searched few topics i'm still stuck, i'm new c# , error starting give me headache. i'm trying initilise list keep getting error message. welcome.

public static list<bookoperator> createbookoperators()          {          list<bookoperator> ops = new list<bookoperator>();          bookoperator op = new bookoperator(ops);         ops.add(op);          return ops;    }

it looks me there no reason try , pass list book-operator. money says:

public static list<bookoperator> createbookoperators()      {     list<bookoperator> ops = new list<bookoperator>();     bookoperator op = new bookoperator();     ops.add(op);      return ops; }

or more tersely:

public static list<bookoperator> createbookoperators() {     return new list<bookoperator> {         new bookoperator()     }; }

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