using System;

public class Program

{

    public static void Main()

    {

        var rectAngle = new Rectangle { Height =10 ,Width=10};

        var areaCalculator = new AreaCalculator();

        Console.WriteLine(areaCalculator.TotalArea(rectAngle));

    }

}

public class Rectangle{  

   public double Height {get;set;}  

   public double Width {get;set; }  

} 

​

public class AreaCalculator {  

   public double TotalArea(Rectangle objRectangle)  

   {  

    return objRectangle.Height * objRectangle.Width;  

​

   }  

}