Whats Wrong with My C# Code?

Whats Wrong with My C# Code?

My program needs to:
a. Generate an array of 20 random integers from zero to nine. Search for
the first occurrence, if any, of the number 7, and report its position in
the array.
b. Repeat the computation of part a 1000 times, and for each position in
the array, report the number of times that the first occurrence of a 7 in
the array is at that position
However whenever I run the program I get strange results (different every
time) such as:
No sevens found at any position
1000 sevens found at one position and no sevens found anywhere else
Hundreds of sevens found in 2 positions, and none found anywhere else.
Does anyone have an idea what is wrong with my program?
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Week_6_Project_2
{
class Program
{
static int intArrayLength = 20;
static int[] resultsArray = new int[intArrayLength];
public static Array generateRandomArray() {
int[] randomNumberArray = new int[intArrayLength];
Random random = new Random();
int popcounter = 0;
while (popcounter < intArrayLength) {
randomNumberArray[popcounter] = random.Next(0, 10);
popcounter += 1;
}
return randomNumberArray;
}
public static void searchForSevens()
{
int counter = 0;
int[] randomArray = (int[])generateRandomArray();
while (counter < intArrayLength)
{
if (randomArray[counter] == 7)
{
resultsArray[counter] += 1;
counter = intArrayLength;
}
counter += 1;
}
}
static void Main()
{
int searchCounter = 0;
while (searchCounter < 1000)
{
searchForSevens();
searchCounter += 1;
}
int displayCounter = 0;
while (displayCounter < intArrayLength)
{
Console.WriteLine("Number of first occurrence of 7 at position
{0} = {1}", displayCounter, resultsArray[displayCounter]);
displayCounter += 1;
}
Console.ReadLine();
}
}
}