Passing ref-types by ref : Class as Parameter « Class « C# / CSharp Tutorial

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C# / CSharp Tutorial » Class » Class as Parameter 
7.31.1.Passing ref-types by ref
using System;

class Person
{
  public string fullName;
  public int age;

  public Person(string n, int a)
  {
    fullName = n;
    age = a;
  }

  public void PrintInfo()
  {
    Console.WriteLine("{0} is {1} years old", fullName, age);
  }
}

class MainClass
{
  public static void SendAPersonByReference(ref Person p)
  {
    p.age = 555;

    p = new Person("TOM"999);
  }


  public static void Main() 
  {
    Person mel = new Person("Mel"23);
    mel.PrintInfo();
    SendAPersonByReference(ref mel);
    mel.PrintInfo();
  }
}
Mel is 23 years old
TOM is 999 years old
7.31.Class as Parameter
7.31.1.Passing ref-types by ref
7.31.2.Use interface as a parameter
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