C# constructor execution order

by

The order is:

  • Member variables are initialized to default values for all classes in the hierarchy

Then starting with the most derived class:

  • Variable initializers are executed for the most-derived type
  • Constructor chaining works out which base class constructor is going to be called
  • The base class is initialized (recurse all of this 🙂
  • The constructor bodies in the chain in this class are executed (note that there can be more than one if they’re chained with Foo() : this(...) etc

Note that in Java, the base class is initialized before variable initializers are run. If you ever port any code, this is an important difference to know about 🙂

I have a page with more details if you’re interested.

More Related Contents:

  1. Calling the base constructor in C#
  2. How to do constructor chaining in C#
  3. C# Error: Parent does not contain a constructor that takes 0 arguments
  4. Inheritance with base class constructor with parameters [duplicate]
  5. C# – Making all derived classes call the base class constructor
  6. Why can’t I create an abstract constructor on an abstract C# class?
  7. Why are constructors not inherited in C#?
  8. How to inherit constructors?
  9. base() and this() constructors best practices
  10. Why not inherit from List?
  11. Virtual member call in a constructor
  12. Why must “stride” in the System.Drawing.Bitmap constructor be a multiple of 4?
  13. C# member variable initialization; best practice?
  14. Call one constructor from another
  15. ‘UserControl’ constructor with parameters in C#
  16. Get all derived types of a type
  17. Using C# reflection to call a constructor
  18. Convert base class to derived class [duplicate]
  19. How do I override List’s Add method in C#?
  20. Struct constructor: “fields must be fully assigned before control is returned to the caller.”
  21. In C#, is it possible to cast a List to List?
  22. Why aren’t generic type constraints inheritable/hierarchically enforced
  23. C# static member “inheritance” – why does this exist at all?
  24. Automatically implemented property in struct can not be assigned
  25. Why can’t my public class extend an internal class?
  26. Why must an C# interface method implemented in a class be public?
  27. Is generic constructor in non-generic class supported?
  28. Initialize field before super constructor runs?
  29. What is the function of the “this” keyword in a constructor?
  30. Adding an event handler for a control in child form from parent form in C#

Leave a Comment