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

A forward variation on the backward for loop:

for (int i = 0; i < collection.Count; )
    if (ShouldBeDeleted(collection[i]))
        collection.RemoveAt(i)
    else
        i++;