Generating random numbers without repeating.C#

Question

Hi everyone I am trying to generate 6 different numbers on the same line in c# but the problem that i face is some of the numbers are repeating on the same line.Here is my c

Answer 1

Create a HashSet and generate a unique random numbers

public List GetRandomNumber(int from,int to,int numberOfElement)
{
    var random = new Random();
    HashSet numbers = new HashSet();
    while (numbers.Count < numberOfElement)
    {
        numbers.Add(random.Next(from, to));
    }
    return numbers.ToList();
}