listbox删除元素错误

• when i try to remove ListBox item(ListItem) its giving error
  error  :
  List that this enumerator is bound to has been modified. An enumerator can only be used if the list does not change.
  i have only ListItem objects in my ListBox and my code as follows
  foreach (ListItem removeitem in listBox1.SelectedItems)
  {
  listBox1.Items.Remove(removeitem);
  }
  或者

foreach (string Titem in xml_target.SelectedItems)

{

xml_target.Items.Remove(Titem);

}

错误信息：

List that this enumerator is bound to has been modified. An enumerator can only be used if the list does not change.

解决办法：

• while(listBox1.SelectedItems.Count!=0)
  {
  listBox1.Items.Remove(listBox1.SelectedItems[0]);
  }

while (xml_target.SelectedItems.Count != 0)

{

xml_target.Items.Remove(xml_target.SelectedItems[0]);

}