cast class into another class or convert class to another

Question

my question is shown in this code

I have class like that

public class  maincs
{
  public int a;
  public int b;
  public int c;
  public int d; 
}
         


        

Answer 1

You could change your class structure to:

public class maincs : sub1
{
   public int d; 
}

public class sub1
{
   public int a;
   public int b;
   public int c;
}

Then you could keep a list of sub1 and cast some of them to mainc.