Collection was modified; enumeration operation may not execute

Question

I can\'t get to the bottom of this error, because when the debugger is attached, it does not seem to occur.

Collection was modified; enumeration operatio

Answer 1

InvalidOperationException- An InvalidOperationException has occurred. It reports a "collection was modified" in a foreach-loop

Use break statement, Once the object is removed.

ex:

ArrayList list = new ArrayList(); 

foreach (var item in list)
{
    if(condition)
    {
        list.remove(item);
        break;
    }
}