Quadratic Equation

using System;

class QuadraticEquation
{
    static void Main()
    {
        Console.Write("a= ");
        double a = double.Parse(Console.ReadLine());
        Console.Write("b= ");
        double b = double.Parse(Console.ReadLine());
        Console.Write("c= ");
        double c = double.Parse(Console.ReadLine());
        double diskrimin = (b*b) - 4 * a * c;
        double diskriminSqrt = Math.Sqrt(diskrimin);
        double x1 = (-b - diskriminSqrt)/ (2 * a);
        double x2 = (-b + diskriminSqrt) / (2 * a);
        if (x1==x2)
        {
            Console.WriteLine("x1=x2={0}",x1);
        }
        else
        {
            Console.WriteLine("x1={0}", x1);
            Console.WriteLine("x2={0}", x2);
        }

    }
}