int[] i = new int[100];
ArrayList array = new ArrayList();
Random rd = new Random();
int b = 0;
while(array.Count < 100)
{
int num = rd.Next(1, 101);
if (!array.Contains(num))
{
array.Add(num);
i[b++] = num;
}
}
for (int n = 0; n < 100; n++)
{
Console.Write(i[n]);
}