using System;

using System.Collections.Generic;

​

public class QuadraticEq {

    private double discriminant;

    private double a;

    private double b;

    private double c;

    public double Discriminant{

        get{return discriminant;}

    }

    public double[] GetRealRoots(){

        int size =0;

        double[]dummy = new double[size];

        if(discriminant == 0){

            size = 1;

            double[]arr = new double[size];

            arr[0] = -b/(2*a);

            return arr;

        }

        else if (discriminant < 0){

            size = 0;

            double[] arr = new double[size];

            return arr;

        }

        else if (discriminant > 0){

            size =2;

            double[] arr = new double[size];

            arr[0] = (-b + Math.Sqrt(discriminant))/ (2*a);

            arr[1] = (-b - Math.Sqrt(discriminant))/ (2*a);

            return arr;

        }

        return dummy;

    }

    public QuadraticEq(int a , int b , int c ){

        this.a = a;

        this.b = b;

        this.c = c;

        discriminant = (double)b * b - 4 * a * c;

    }

}

​

public class Program

{

    public static void Main()

    {

        QuadraticEq qd = new QuadraticEq(1,5,6);

        Console.WriteLine(qd.Discriminant);

        double[] results = qd.GetRealRoots();

        foreach (int x in results)

            Console.WriteLine(x);

​

    }

}