C# | SortedDictionary.Add() Method

21 Jan, 2019
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 SortedDictionaryusing 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);        }    }}
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 SortedDictionaryusing 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.");        }    }}
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
CSharp SortedDictionary Class
CSharp-Generic-Namespace
CSharp-method
C#
Writing code in comment?
Please use ide.geeksforgeeks.org,
generate link and share the link here.
C# | Multiple inheritance using interfaces
Differences Between .NET Core and .NET Framework
Extension Method in C#
C# | List Class
HashSet in C# with Examples
C# | .NET Framework (Basic Architecture and Component Stack)
Switch Statement in C#
Partial Classes in C#
Lambda Expressions in C#
Hello World in C#