C# Online Compiler | .NET Fiddle

//Learn LSP at https://www.tutorialsteacher.com/csharp/liskov-substitution-principle
using System;

public class Program
{
	public static void Main()
	{
		Rectangle sqr1 = new Square();
		sqr1.Height = 6;
		sqr1.Width = 8;
		
		Console.WriteLine(AreaCalculator.CalculateArea(sqr1)); //returns 64
		
		Rectangle sqr2 = new Square();
		sqr2.Height = 8;
		sqr2.Width = 6;
		
		Console.WriteLine(AreaCalculator.CalculateArea(sqr2)); //returns 36
	}
}

public class Rectangle
{
	public virtual int Height { get; set; }

	public virtual int Width { get; set; }
}

class Square : Rectangle
{
	private int _height;
	private int _width;
	public override int Height
	{
		get
		{
			return _height;
		}

		set
		{
			_height = value;
			_width = value;
		}
	}

	public override int Width
	{
		get
		{
			return _width;
		}

		set
		{
			_width = value;
			_height = value;
		}
	}
}

public class AreaCalculator
{
	public static int CalculateArea(Rectangle r)
	{
		return r.Height * r.Width;
	}
}

 
//Learn LSP at https://www.tutorialsteacher.com/csharp/liskov-substitution-principle
using System;
​
public class Program
{
    public static void Main()
    {
        Rectangle sqr1 = new Square();
        sqr1.Height = 6;
        sqr1.Width = 8;
        
        Console.WriteLine(AreaCalculator.CalculateArea(sqr1)); //returns 64
        
        Rectangle sqr2 = new Square();
        sqr2.Height = 8;
        sqr2.Width = 6;
        
        Console.WriteLine(AreaCalculator.CalculateArea(sqr2)); //returns 36
    }
}
​
public class Rectangle
{
    public virtual int Height { get; set; }

Cached Result

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