SortedList class is a collection of
(key, value) pairs which are sorted according to keys. Those pairs can be accessible by key and as well as by index(zero-based indexing). This comes under
System.Collections namespace.
SortedList.ContainsKey(Object) method is used to check whether a SortedList object contains a specific key or not.
Properties:
- A SortedList element can be accessed by its key or by its index.
- A SortedList object internally maintains two arrays to store the elements of the list, i.e, one array for the keys and another array for the associated values.
- A key cannot be null, but a value can be.
- The capacity of a SortedList object is the number of elements the SortedList can hold.
- A SortedList does not allow duplicate keys.
- Operations on a SortedList object tend to be slower than operations on a Hashtable object because of the sorting.
- Elements in this collection can be accessed using an integer index. Indexes in this collection are zero-based.
Syntax:
public virtual bool ContainsKey (object key);
Here,
key is the key to locate in the SortedList object.
Return Value: This method will return
True if the SortedList object contains an element with the specified key otherwise it returns
False.
Exceptions:
- ArgumentNullException : If the key is null.
- InvalidOperationException : If the comparer throws an exception.
Below given are some examples to understand the implementation in a better way:
Example 1:
Example 2:
