I had learnt by reading your great answers here, that it is not good practice deleting items from within a foreach loop, as it is (and I quote) "Sawing off the branch you're sitting on".

My code currently removes the text from the dropdownlist, but the actual item remains (just without text displayed).

In other words, it isn't deleting, and probably can't because you can't delete from within a foreach loop.

After hours of trying I am unable to get my head around a way of doing it.

//For each checked box, run the delete code
for (int i = 0; i < this.organizeFav.CheckedItems.Count; i++)
        {

//this is the foreach loop
            foreach (ToolStripItem mItem in favoritesToolStripMenuItem.DropDownItems)
            {

                //This rules out seperators
                if (mItem is ToolStripMenuItem)
                {
                    ToolStripMenuItem menuItem = mItem as ToolStripMenuItem;

             //This matches the dropdownitems text to the CheckedItems String
                    if (((ToolStripMenuItem)mItem).Text.ToString() == organizeFav.CheckedItems[i].ToString())
                    {
                         //And deletes the item
                        menuItem.DropDownItems.Remove(mItem);
                    }
                }
            }
        }

But it isn't deleting because it is within a foreach loop! I would greatly appreciate your help, and be truly amazed if anyone can get their head around this code :)

Kind Regards