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using System;
 
public class Shape{
    public String name;
 
    public abstract double area();
}
 
public class Rectangle: Shape{
    private double width;
    private double height;
 
    public Rectangle(String name, double width, double height){
        this.name = name;
        this.width = width;
        this.height;
    }
 
    public double area(){
        rturn this.width * this.height);
    }
 
}
 
public class Test
{
	public static void Main()
	{
		Rectangle r = new Rectgale("r", 10, 3);
 
        Console.Writeln(r.name + "'s area is " + r.area());
	}
}

prog.cs(20,14): error CS1525: Unexpected symbol `this'
prog.cs(20,27): error CS1525: Unexpected symbol `this'
prog.cs(20,38): error CS1525: Unexpected symbol `)', expecting `;' or `}'
Compilation failed: 3 error(s), 0 warnings

Standard output is empty