如何：编写复制构造函数（C# 编程指南）
C# 不会为对象提供复制构造函数，但是，您可以自己编写。
示例
在下面的示例中，Person 类定义采用 Person 实例作为其参数的复制构造函数。 将参数属性的值赋给 Person 新实例的属性。 代码包含一个备用复制构造函数，可以将想要复制的实例的 Name 和 Age 属性发送到选件类的实例构造函数中。
class Person
{
// Copy constructor.
public Person(Person previousPerson)
{
Name = previousPerson.Name;
Age = previousPerson.Age;
}
//// Alternate copy constructor calls the instance constructor.
//public Person(Person previousPerson)
// : this(previousPerson.Name, previousPerson.Age)
//{
//}
// Instance constructor.
public Person(string name, int age)
{
Name = name;
Age = age;
}
public int Age { get; set; }
public string Name { get; set; }
public string Details()
{
return Name + " is " + Age.ToString();
}
}
class TestPerson
{
static void Main()
{
// Create a Person object by using the instance constructor.
Person person1 = new Person("George", 40);
// Create another Person object, copying person1.
Person person2 = new Person(person1);
// Change each person's age.
person1.Age = 39;
person2.Age = 41;
// Change person2's name.
person2.Name = "Charles";
// Show details to verify that the name and age fields are distinct.
Console.WriteLine(person1.Details());
Console.WriteLine(person2.Details());
// Keep the console window open in debug mode.
Console.WriteLine("Press any key to exit.");
Console.ReadKey();
}
}
// Output:
// George is 39
// Charles is 41