Remove Items The Remove method removes an item with the specified key from the collection. The following code snippet removes an item.
// Remove item with key = 'Mahesh Chand'
AuthorList.Remove("Mahesh Chand");
The Clear method removes all items from the collection. The following code snippet removes all items by calling the Clear method.
// Remove all items
AuthorList.Clear();
Learn more:
Working with SortedDictionary using C#