Maximums Of Array

public class Kata {
  public static int MaxProduct(int[] arr, int size) {
    // sort integers from largest to smallest
    // iterate through the array/list multiplying integers until the counter is equal to size value.
    // return result
    int temp = 0;
    int result = 0;
    for(int a = 0;a < arr.Length;a++)
    {
       for(int b = a+1;b < arr.Length;b++)
       {
           if(arr[a] < arr[b])
           {
              temp = arr[a];
              arr[a] = arr[b];
              arr[b] = temp;
           }
       }
    }

    for(int x = 0;x < size;x++)
    {
       if(result == 0)
       {
          result = arr[x];
       }

       else
       {
          result = result * arr[x];
       }
    }

    return result;
  }
}