array list

The only improvement to Karans code is this.
          
for (int i = 0; i < arr.Length; i++)
            {
                sum += (arr[i] % 2 == 0) ? arr[i] : 0;
            }

int[] arr = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
int sum = 0;
for (int i = 0; i < arr.Length; i++)
{
if (arr[i] % 2 == 0)
{
sum += arr[i];
}
}
MessageBox.Show(sum.ToString());