1int count = myArrayList.Count;
2for(int i=0; i<count;)
3{
4        myArrayListItem item = (myArrayListItem)myArrayList[i];
5        if (myArrayListItem.MyPropery > someValue)
6        {
7                myArrayList.RemoveAt(i);
8                count--;
9        } else {
10                i++;
11        }
12
13}