The collection was modified. Enumeration operation may not execute.

When I use the code snippet below to delete itemCollection, it will throw error:

The collection was modified.  Enumeration operation may not execute.

Microsoft.SharePoint.Client.ListItemCollection listItems = list.GetItems(camlQuery);
                    clientContext.ExecuteQuery();
                    clientContext.Load(list);
                    clientContext.Load(listItems);
                    clientContext.ExecuteQuery();
                    foreach (Microsoft.SharePoint.Client.ListItem item in listItems)
                    {
                        item.DeleteObject();
                        clientContext.ExecuteQuery();
                    }