Pass references to methods : Parameter Reference : Language Basics C# Examples

    
using  System;  
  
class  MyClass  {    
    int  a,  b;  
    
    public  MyClass(int  i,  int  j)  {    
        a  =  i;    
        b  =  j;    
    }    
    
    /*  Return  true  if  ob  contains  the  same  values  as  the  invoking  object.  */  
    public  bool  sameAs(MyClass  ob)  {    
        if((ob.a  ==  a)  &  (ob.b  ==  b))  
              return  true;    
        else  return  false;    
    }    
  
    public  void  copy(MyClass  ob)  {  
        a  =  ob.a;  
        b    =  ob.b;  
    }  
  
    public  void  show()  {  
        Console.WriteLine("a:  {0},  b:  {1}",  
                                            a,  b);  
    }  
}    
    
class  MainClass  {    
    public  static  void  Main()  {  
        MyClass  ob1  =  new  MyClass(4,  5);    
        MyClass  ob2  =  new  MyClass(6,  7);    
    
        Console.Write("ob1:  ");  
        ob1.show();  
  
        Console.Write("ob2:  ");  
        ob2.show();  
  
        if(ob1.sameAs(ob2))    
            Console.WriteLine("ob1  and  ob2  have  the  same  values.");  
        else  
            Console.WriteLine("ob1  and  ob2  have  different  values.");  
  
        Console.WriteLine();  
  
        //  now,  make  ob1  a  copy  of  ob2  
        ob1.copy(ob2);  
  
        Console.Write("ob1  after  copy:  ");  
        ob1.show();  
  
        if(ob1.sameAs(ob2))    
            Console.WriteLine("ob1  and  ob2  have  the  same  values.");  
        else  
            Console.WriteLine("ob1  and  ob2  have  different  values.");  
  
    }    
}