C#遍历CheckedListBox中的勾选项

string selectedItem = string.Empty;
            for(int i=0; i < checkedListBox1.Items.Count; i++)
            {
                if (checkedListBox1.GetItemChecked(i))
                { selectedItem = selectedItem + " " + checkedListBox1.Items[i].ToString(); }
            }

string selectedItem = string.Empty;
            for(int i=0; i < checkedListBox1.SelectedItems.Count; i++)
            {
               
                 selectedItem = selectedItem + " " + checkedListBox1.SelectedItems[i].ToString(); 
            }