Question

here is the code for generating random numbers,but I am getting duplicate numbers,how can I overcome this.

    void getnumbers()

    {
        Random r = new Random();
        int[] trubyte = new int[4];
        for (var x = 0; x < 4; ++x)
        {
            trubyte[x] = r.Next(1, 5);
        }
        b1.Content = trubyte[0];
        b2.Content = trubyte[1];
        b3.Content = trubyte[2];
        b4.Content = trubyte[3];
    }

Answer 1

we can use dictionary instead of hash-set in windows phone application.
below is the code for generating distinct random numbers.

    static int[] GetRandomNumbersNonrepeat(int noOfRandomNumbers, int maxValue)



    {
        Dictionary<int, int> randomnumbers = new Dictionary<int, int>();
        while (randomnumbers.Count < maxValue)
        {
            Random r = new Random();
            int rnum = r.Next(1, maxValue+1);

            if (!randomnumbers.ContainsValue(rnum))
            {

                randomnumbers.Add(randomnumbers.Count + 1, rnum);
            }

        }



        int[] rnums = randomnumbers.Values.ToArray<int>();
        return rnums;
    }