Leet rearrange

void Rearrange(List<int> v)
{
    int[] counts = new int[3];
    foreach (var e in v)
    {
        counts[e]++;
    }

    int iNext = 0;
    int limit = counts[0];
    for (; iNext < limit; iNext++)
    {
        v[iNext] = 0;
    }
    limit += counts[1];
    for (; iNext < limit; iNext++)
    {
        v[iNext] = 1;
    }
    for (; iNext < v.Count; iNext++)
    {
        v[iNext] = 2;
    }
}