Public vs private access : Class Access Modifiers : Class Interface C# Source Code

    

/*
C#: The Complete Reference 
by Herbert Schildt 

Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/
// Public vs private access. 
 
using System; 
 
class MyClass {  
  private int alpha; // private access explicitly specified 
  int beta;          // private access by default 
  public int gamma;  // public access 
 
  /* Methods to access alpha and beta.  It is OK for a 
     member of a class to access a private member 
     of the same class. 
  */ 
  public void setAlpha(int a) { 
    alpha = a;  
  } 
 
  public int getAlpha() { 
    return alpha; 
  } 
 
  public void setBeta(int a) { 
    beta = a;  
  } 
 
  public int getBeta() { 
    return beta; 
  } 
}  
  
public class AccessDemo {  
  public static void Main() {  
    MyClass ob = new MyClass();  
  
    /* Access to alpha and beta is allowed only 
       through methods. */ 
    ob.setAlpha(-99); 
    ob.setBeta(19); 
    Console.WriteLine("ob.alpha is " + ob.getAlpha()); 
    Console.WriteLine("ob.beta is " + ob.getBeta()); 
 
    // You cannot access alpha or beta like this: 
//  ob.alpha = 10; // Wrong! alpha is private! 
//  ob.beta = 9;   // Wrong! beta is private! 
 
    // It is OK to directly access gamma because it is public. 
    ob.gamma = 99;  
   }  
}