OrderedDictionary.Add(Object, Object) method is used to add an entry with the specified key and value into the OrderedDictionary collection with the lowest available index.
public void Add (object key, object value);
key : The key of the entry to add.
value : The value of the entry to add. This value can be null.
- NotSupportedException : If the OrderedDictionary collection is read-only.
- ArgumentException : If an element with the same key already exists in the OrderedDictionary collection.
Below given are some examples to understand the implementation in a better way:
5 key1 --> value1 key2 --> value2 key3 --> value3 key4 --> value4 key5 --> value5
System.ArgumentException: Item has already been added. Key in dictionary: ‘key2’ Key being added: ‘key2’
Note: A key cannot be null, but a value can be.
Attention reader! Don’t stop learning now. Get hold of all the important DSA concepts with the DSA Self Paced Course at a student-friendly price and become industry ready.