Question

Hashtable values = new Hashtable();

protected void Button1_Click(object sender, EventArgs e)
{
    Random r = new Random();
    int newval = r.Next(10);

    values.Add("key",newval);


    //foreach (object value in values.Values)
    //{
    //    Response.Write(value.ToString());
    //}


    ArrayList arrayList = new ArrayList(values.Values);
    foreach (int key in arrayList)
    {
        Response.Write(key);
    }
}

Answer 1

It’s random. By definition there exists a statistical possibility that numbers will repeat. It’s possible that you can add 10 random integers from 1-10 to a list and that they wouldn’t repeat, but it would be unlikely.

Ideally, each time you call a randomization function, you have exactly the same odds of getting any one number as you do of getting any other number, including the number you got last time.