Question

is there any good method to generate random even numbers with C#? I came up with this code:

    Random RandString = new Random(0);

code:

    private void button6_Click(object sender, EventArgs e)
    {
        int min = 0;
        int max = 50;

        int rand = RandString.Next(min, max-1);
        while (rand % 2 == 1) // odd
        {
            rand = RandString.Next(min, max-1);
        }

        textBox4.Text = "" + rand;
    }

Problems with this code:

• my current solution might not be the fastest of all
• very often, numbers that are generated by this method are repeated with the same sequence! For example after 5 iterations I can get: 8, 10, 20, 30, 16. After more clicking (for like 15 seconds) I can get 10, 30, 20 in a row or 30, 20, 10.. I’m not sure, but that’s NOT what I call “random”.

so is there any way to deal with the problem that I’ve described, or is there any other method?

Answer 1

textBox4.Text = (2 * rand.Next(min / 2, max / 2)).ToString();