Write a console application that implements a Square shape.

firas 
i think you want to create console with graphics which draw a box on console window i have 
coded such program but i have written that logic in main function though you can create 
class fro that code and use to create box.

Hi 
Find the below code-

class Square
{
public decimal Side{get;set;}
public Square(){}
public Square(decimal _side){ Side = _side; }
public decimal PrintArea()
{
        return Side*Side;
}
}

class ExecutionClass
{
        public static void Main(string[] str)
        {
                Square s = new Square(12.5);
                //or
                //Square s1 = new Square();
                //s1.Side = 12.5;
                Console.WriteLine(s.PrintArea());
                Console.ReadKey();
        }
}

Hope this answered your problem, mark it answered if it is so.