c# - Resharper 警告在构造函数中使用虚函数，但与 C++ 不同，这不是错误

Question

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Answer 1

已回答:

Virtual member call in a constructor

简而言之，它与构造函数的调用顺序有关，这与调用虚方法的顺序不同:构造函数从不太具体到最具体，而虚方法从最具体的到不太具体的调用。

这意味着你可能会落入这个陷阱:

public class Base {
  protected virtual void DoSomething() {
    // do nothing
  }

  public Base() {
    DoSomething();
  }
}

public class Another : Base {
  private List<string> list;

  public Another() {
    list = new List<string>();
  }

  protected override void DoSomething() {
    // this code will raise NullReferenceException,
    // since this class' constructor was not run yet,
    // still, this method was run, since it was called
    // from the Base constructor
    list.Add("something");
  }
}