Range in c#

class util
    {
        public static IEnumerable<int> Range(int min, int max)
        {
            while (true)
            {
                if (min >= max)
                {
                    yield break;
                }
                yield return min++;
            }
        }
    }
 
//Usage
            foreach (int notToUseVariable in util.Range(0,10))
            {
                btn[notToUseVariable] = notToUseVariable.ToString();
            }