Introduction

C# Program to Calculate Area of Square. This program is compiled and tested on a Visual Studio 2012.

using System;

namespace TechStudyCSharp
{
    class Program
    {
        static void Main(string[] args)
        {
            double side, area;
            Console.WriteLine("Enter the Length of Side : ");
            side = Convert.ToDouble( Console.ReadLine());
            area = side * side;
            Console.WriteLine("\nArea of Square: " + area);          
            Console.ReadKey();
        }
    }
}

Result