从另一个构造函数调用构造函数
public class Animal
{
public string Name { get; set; }
public Animal() : this("Dog")
{
}
public Animal(string name)
{
Name = name;
}
}
var dog = new Animal(); // dog.Name will be set to "Dog" by default.
var cat = new Animal("Cat"); // cat.Name is "Cat", the empty constructor is not called.