Why is the Int32 sum always returning 0?

Vote count:

0

I know at least one value is not zero and sum is still always 0

Why?

get 
{
    Debug.WriteLine("ILockSumN");
    Debug.WriteLine(iLocks[2, 1] == (Int32?)null ? 0 : (Int32)iLocks[2, 1]);
    Debug.WriteLine(iLocks[3, 1] == (Int32?)null ? 0 : (Int32)iLocks[3, 1]);
    Debug.WriteLine(iLocks[6, 1] == (Int32?)null ? 0 : (Int32)iLocks[6, 1]);
    Int32 sum =
        iLocks[1, 1] == (Int32?)null ? 0 : (Int32)iLocks[1, 1] +
        iLocks[2, 1] == (Int32?)null ? 0 : (Int32)iLocks[2, 1] +
        iLocks[3, 1] == (Int32?)null ? 0 : (Int32)iLocks[3, 1] +
        iLocks[4, 1] == (Int32?)null ? 0 : (Int32)iLocks[4, 1] +
        iLocks[5, 1] == (Int32?)null ? 0 : (Int32)iLocks[5, 1] +
        iLocks[6, 1] == (Int32?)null ? 0 : (Int32)iLocks[6, 1];
    Debug.WriteLine(sum);
    return sum; 
} 

asked 37 secs ago

Blam

19.9k

Why is the Int32 sum always returning 0?