C# | SortedDictionary.Add() Method
This is used to add a specified key and value to the sorted dictionary. The elements are sorted according to TKey.
Syntax:
public void Add (TKey key, TValue value);
Parameters:
key: It is the key of the element to add.
value: It is the value of the element to add. The value can be null for reference types.
Exceptions:
- ArgumentNullException : If the key is null.
- ArgumentException : If an element with the same key already exists in the Dictionary.
Below are the programs to illustrate the use of Dictionary<TKey, TValue>.Add() Method:
Example 1:
// C# code to add the specified key // and value into the SortedDictionary using System; using System.Collections.Generic; class GFG { // Driver code public static void Main() { // Create a new SortedDictionary // of strings, with string keys. SortedDictionary< string , string > myDict = new SortedDictionary< string , string >(); // Adding key/value pairs in myDict myDict.Add( "Australia" , "Canberra" ); myDict.Add( "Belgium" , "Brussels" ); myDict.Add( "Netherlands" , "Amsterdam" ); myDict.Add( "China" , "Beijing" ); myDict.Add( "Russia" , "Moscow" ); myDict.Add( "India" , "New Delhi" ); // To get count of key/value // pairs in myDict Console.WriteLine( "Total key/value pairs in" + " myDict are : " + myDict.Count); // Displaying the key/value // pairs in myDict Console.WriteLine( "The key/value pairs" + " in myDict are : " ); foreach (KeyValuePair< string , string > kvp in myDict) { Console.WriteLine( "Key = {0}, Value = {1}" , kvp.Key, kvp.Value); } } } |
Output:
Total key/value pairs in myDict are : 6 The key/value pairs in myDict are : Key = Australia, Value = Canberra Key = Belgium, Value = Brussels Key = China, Value = Beijing Key = India, Value = New Delhi Key = Netherlands, Value = Amsterdam Key = Russia, Value = Moscow
Example 2:
// C# code to add the specified key // and value into the SortedDictionary using System; using System.Collections.Generic; class GFG { // Driver code public static void Main() { // Create a new SortedDictionary // of strings, with string keys. SortedDictionary< string , string > myDict = new SortedDictionary< string , string >(); // Adding key/value pairs in myDict myDict.Add( "Australia" , "Canberra" ); myDict.Add( "Belgium" , "Brussels" ); myDict.Add( "Netherlands" , "Amsterdam" ); myDict.Add( "China" , "Beijing" ); myDict.Add( "Russia" , "Moscow" ); myDict.Add( "India" , "New Delhi" ); // The Add method throws an // exception if the new key is // already in the dictionary. try { myDict.Add( "Russia" , "Moscow" ); } catch (ArgumentException) { Console.WriteLine( "An element with Key " + "= \"Russia\" already exists." ); } } } |
Output:
An element with Key = "Russia" already exists.
Note:
- A key cannot be null, but a value can be. If the value type TValue is a reference type.
- This method is an O(log n) operation, where n is Count of elements in the SortedDictionary.
Reference:
- https://docs.microsoft.com/en-us/dotnet/api/system.collections.generic.sorteddictionary-2.add?view=netframework-4.7.2
Contact Us