Fastest way to detect duplicate numbers on array vb.net 2005

Question

I have this project that let user inputs 5 different numbers from 1 to 50. But I want to validate it before saving to DB that i will be 5 unique numbers. What\'s the best an

Answer 1

Pseudocode:

integer numbers[50]
zeroarray(numbers, 50)

integer count = 0;
while (count < 5)
{
   integer value = getinput()

   if (value >= 1 and value <= 50)
     if (numbers[value] = 0)
     {
        count = count + 1
        numbers[value] = 1
     }
     else
        reject duplicate
   else
     reject invalid
}