Efficiently deleting item from within 'foreach'

Question

For now, the best I could think of is:

bool oneMoreTime = true;
while (oneMoreTime)
{
    ItemType toDelete=null;
    oneMoreTime=false;
    foreach (ItemTyp         


        

Answer 1

The lambda way is good. You could also use a regular for loop, you can iterate lists that a for loop uses within the loop itself, unlike a foreach loop.

for (int i = collection.Count-1; i >= 0; i--)
{
    if(ShouldBeDeleted(collection[i])
        collection.RemoveAt(i);
}

I am assuming that collection is an arraylist here, the code might be a bit different if you are using a different data structure.