Strange “Collection was modified after the enumerator was instantiated” exception

Question

Perhaps someone can point me in the correct direction, because I\'m completely stumped on this.

I have a function that simply prints out a LinkedList of classes:

Answer 1

I don't know if this is relevant to the OP but I had the same error and found this thread during a google search. I was able to solve it by adding a break after removing an element in the loop.

foreach( Weapon activeWeapon in activeWeapons ){

            if (activeWeapon.position.Z < activeWeapon.range)
            {
                activeWeapons.Remove(activeWeapon);
                break; // Fixes error
            }
            else
            {
                activeWeapon.position += activeWeapon.velocity;
            }
        }
    }

If you leave out the break, you will get the error "InvalidOperationException: Collection was modified after the enumerator was instantiated."