Introduction
C# Program to Calculate Area of Circle. This program is compiled and tested on a Visual Studio 2012..
using System; namespace TechStudyCSharp { class Program { static void Main(string[] args) { double radius, area; Console.WriteLine("Enter Radius: "); radius = Convert.ToDouble( Console.ReadLine()); area = Math.PI * radius * radius; Console.WriteLine("\nArea of circle: "+area); Console.ReadKey(); } } }