Pick your poison and don't duplicate code you dirty noob
---
public class Turn {
    private Action action = null;
    private Take take = null;

    public Turn(Action action) : this (action, null) {}

    public Turn(Action action, Take take) {
        this.action = action;
        this.take = take;
    }
}

---

public class Turn {
    private Action action = null;
    private Take take = null;

    public Turn(Action action)  {
        this.action = action;
    }

    public Turn(Action action, Take take) : this(action) {
        this.take = take;
    }
}