using System;

// C# program to illustrate the 

// concept of inheritance in the 

// constructor when the derived 

// class contains a constructor

​

// Class Tank to give the 

// dimension of the tank 

class Tank { 

    double t_radius; 

    double t_height; 

    // Properties for Radius and Height 

    public double Radius 

    { 

        get {  

               return t_radius;  

            } 

        set { 

               t_radius = value < 0 ? -value : value; 

            } 

    } 

    public double Height 

    { 

        get {  

               return t_height;  

            } 

        set {  

              t_height = value < 0 ? -value : value;  

            } 

    } 

    // Display the dimension of tanks 

    public void DisplayDimension() 

    { 

        Console.WriteLine("The radius of tank is :" + Radius  

                 + " and the height of tank is :" + Height); 

    } 

} 

// A derived class AreaOfTank  

// inheriting Tank Class 

class AreaOfTank : Tank { 

    string Color; 

    // Constructor 

    public AreaOfTank(string c, double r, double h) 

    { 

        // from base class 

        Radius = r; 

        Height = h; 

        // from derived class 

        Color = c; 

    } 

    // Return area of tank 

    public double Area() 

    { 

        return 2 * 3.14 * Radius * Height; 

    } 

    // Display the color of tank 

    public void DisplayColor() 

    { 

        Console.WriteLine("The Color of tank is " 

                                        + Color); 

    } 

} 

​

public class Program // Console Driver

{

    public static void Main()

    {

        // Create and initialize the 

        // object of AreaOfTank 

        AreaOfTank t1 = new AreaOfTank("Green", 6.0, 12.0); 

        t1.DisplayColor(); 

        t1.DisplayDimension(); 

        Console.WriteLine("Area is " + t1.Area());

    }

}