add-to-heap.cs

public void add(int value)
{
    list.Add(value);
    int i = heapSize - 1;
    int parent = (i - 1) / 2;

    while (i > 0 && list[parent] < list[i])
    {
        int temp = list[i];
        list[i] = list[parent];
        list[parent] = temp;

        i = parent;
        parent = (i - 1) / 2;
    }
}