Does calling Clear disposes the items also?

Many times there is a clear method, that removes all the items from the collections, are these items disposed also.

Like,

toolStripMenuItem.DropDownItems.Clear();

is sufficient, or should I have to call like that:

foreach (ToolStripItem item in toolStripMenuItem.DropDownItems)
{
  toolStripMenuItem.DropDownItems.Remove(item);
  item.Dispose();
}

Edit: Well ToolStripItem is an example not a question, for those who says Clear is enough I found another example, TabControl has also item collection and clear method. But TabControls can have complex controls (at least I have), which needs to be explicitly Dispose (even if they are Disposed automatically at some point by GC, cause they take huge memory). I guess the best answer is divo comment to dispose the items, and then call clear.