C# Quadratic-Equation-Formula

QuadraticEquation.cs

using System;

class QuadraticEquation
{
    static void Main()
    {
        Console.WriteLine("Please enter \"a\":");  // takes the value of the  coefficients
        double a = double.Parse(Console.ReadLine());
        Console.WriteLine("Please enter \"b\":");
        double b = double.Parse(Console.ReadLine());
        Console.WriteLine("Please enter\"c\":");
        double c = double.Parse(Console.ReadLine());
        double D = Math.Pow(b, 2) - 4 * a * c;  // Formula for D
        if (D < 0) // gives you result if D is smaller than 0
        {
            Console.WriteLine("No real roots");
            return;    
        }
        if(D == 0) // gives you result if D is equal to 0
        {
            double x3 = (-b) / (2 * a);
            Console.WriteLine("x1=x2= {0}", x3);
            return;
        }
        double x1 = ((-b) - Math.Sqrt(D)) / (2 * a); // for all other cases this will be your equasion
        Console.WriteLine("Root x1 is:{0}", x1);    
        double x2 = ((-b) + Math.Sqrt(D)) / (2 * a);
        Console.WriteLine("Root x2 is:{0}", x2);

    }
}

wow thanks