virtual

• The virtual keyword signifies that method and property can be overridden.
  
• If the method of base class is not marked virtual, even then it can be overridden in derived class by marking it new.
  

  E.g.:    class Employee
  

  {
  

  protected double basic;
  

  protected double gross;
  

  public void CalcSal()
  

  {
  

  gross = basic + 0.5*basic;
  

  }
  

  }
  

  class Manager : Employee
  

  {
  

  protected double allowances;
  

  public new void CalculateSalary()
  

  {
  

  gross = basic + 0.5*basic + allowances;
  

  }
  

  }