Individual value for each object when inheriting?

Question

C++ / C#

The script inherits variables (let's say B and C). The value B is common for all objects, and C is individual for each object on which the script hangs. How to describe C so that each object is assigned a different meaning , depending on the circumstances accompanying it personally?

Answer 1

Something like this

class A
{
  public virtual int C
  {
    get => 12;    
  }
}

class B :  A
{
  public override int C 
  {
     get => 11;    
  }
}