How to fix this random number genetator

Question

It works in C++, but I can' t get it to work here.

int[] item = new int[20];
int[] number = new int[20];

Random r = new Random();

for(int i=0; i<20; i++)
{
item[i] = i;
}

for(int x=20; ×>0; x--)
{
r.Next(0, x);
number[x-1] = item[r];

while( r < x )
/* this is moving numbers from higher array to lower */
{
item[r] = item[r+1];
r++;
}
}

Answer 1

Thank you a lot. (hvala)

Answer 2

good luck