Use an Action to change the values : Array ForEach : Data Structure C# Examples

    
using  System;        
      
class  MyClass  {  
    public  int  i;    
      
    public  MyClass(int  x)  {  
        i  =  x;  
    }
}
    
class  MainClass  {              
  
    static  void  neg(MyClass  o)  {    
        o.i  =  -o.i;  
    }    
    
    public  static  void  Main()  {              
        MyClass[]  nums  =  new  MyClass[5];    
    
        nums[0]  =  new  MyClass(5);    
        nums[1]  =  new  MyClass(2);    
        nums[2]  =  new  MyClass(3);    
        nums[3]  =  new  MyClass(4);    
        nums[4]  =  new  MyClass(1);    
          
        //  Use  action  to  negate  the  values.  
        Array.ForEach(nums,  MainClass.neg);  
  
    }              
}