C - derived classes and constructors

Subclass object , When there is a part, the base class part , Before executing the constructor of the subclass , The parent constructor will be called implicitly or explicitly

using System;
class MyDerived : MyBase 
{
    int field1 = 1;// First of all , Instance member initialization 
    MyDerived() { }// Third , Subclass constructor 
    // There will be an implicit call , When calling displayed MyDerived():base()
}
class MyBase
{
     public MyBase(){}// second , Parent constructor 
}

Call other constructors of the current class

Use this, It means to call the current class , Like this name Constructors , There may be many names that need to be overloaded , At this time, you only need to create one in the current class , This avoids creating too much duplicate code

This is called calling a public initialized function  

 Pet(int age, string name):this(name){ }
 Pet(string name){ }