C # Learning Notes-basic knowledge (not regularly updated)

1. Does the parent class have to contain constructors?

The parent class must have a constructor, which can be a parameter without a parameter.

Constructors are basic to objects, without constructors there is no object, and in the case of a constructor with parameters shown in the parent class, a constructor must be written to invoke the constructor of the parent class in the subclass inheritance.

If the parent class has no parameters in the constructor, the constructor for the write parent class can not be displayed in the subclass, and the constructor with no parameters is automatically called.

C # Learning Notes-basic knowledge (not regularly updated)