C# | SortedDictionary.Add() Method
Last Updated :
21 Jan, 2019
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This is used to add a specified key and value to the sorted dictionary. The elements are sorted according to TKey.
Syntax:
csharp
csharp
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.
// 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:
Example 2:
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
// 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:
Note:
An element with Key = "Russia" already exists.
- 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.
