public ICollection <T> Shuffle <T>(List <T> list)
{
var listCount = list.Count();
for (int i = 0; i < list.Count; i++)
{
var randomIndex = i + rand.GiveMeRandomNumber(listCount - i);
var temp = list[randomIndex];
list[randomIndex] = list[i];
list[i] = temp;
}
return(list);
}