SortedDictionary.Item[] Property in C#

The SortedDictionary.Item[] property in C# is used to get or set the value associated with the specified key.

Syntax

The syntax is as follows −

public TValue this[TKey k] { get; set; }

Above, the value k is the key of the value to get or set.

Example

Let us now see an example −

 Live Demo

using System; using System.Collections; using System.Collections.Generic; public class Demo {    public static void Main(){       SortedDictionary<int, string> sortedDict = new SortedDictionary<int, string>();       sortedDict.Add(1, "One");       sortedDict.Add(2, "Two");       sortedDict.Add(3, "Three");       sortedDict.Add(4, "Four");       sortedDict.Add(5, "Five");       sortedDict.Add(6, "Six");       Console.WriteLine("SortedDictionary key-value pairs...");       IDictionaryEnumerator demoEnum = sortedDict.GetEnumerator();       while (demoEnum.MoveNext())       Console.WriteLine("Key = " + demoEnum.Key + ", Value = " + demoEnum.Value);       Console.WriteLine("Count of SortedDictionary key-value pairs = "+sortedDict.Count);       sortedDict.Add(7, "Seven");       sortedDict.Add(8, "Eight");       Console.WriteLine("
SortedDictionary key-value pairs...UPDATED");       demoEnum = sortedDict.GetEnumerator();       while (demoEnum.MoveNext())       Console.WriteLine("Key = " + demoEnum.Key + ", Value = " + demoEnum.Value);       Console.WriteLine("Count of SortedDictionary key-value pairs (UPDATED) = "+sortedDict.Count);       Console.WriteLine("Value in the SortedDictionary key-value pair key five = "+sortedDict[5]);       sortedDict.Clear();       Console.WriteLine("
Count of SortedDictionary key-value pairs (UPDATED) = "+sortedDict.Count);    } }

Output

This will produce the following output −

Key = 1, Value = One Key = 2, Value = Two Key = 3, Value = Three Key = 4, Value = Four Key = 5, Value = Five Key = 6, Value = Six Count of SortedDictionary key-value pairs = 6 SortedDictionary key-value pairs...UPDATED Key = 1, Value = One Key = 2, Value = Two Key = 3, Value = Three Key = 4, Value = Four Key = 5, Value = Five Key = 6, Value = Six Key = 7, Value = Seven Key = 8, Value = Eight Count of SortedDictionary key-value pairs (UPDATED) = 8 Value in the SortedDictionary key-value pair key five = Five Count of SortedDictionary key-value pairs (UPDATED) = 0

Example

Let us now see another example −

 Live Demo

using System; using System.Collections; using System.Collections.Generic; public class Demo {    public static void Main(){       SortedDictionary<int, string> sortedDict = new SortedDictionary<int, string>();       sortedDict.Add(1, "SUV");       sortedDict.Add(2, "MUV");       sortedDict.Add(3, "Utility Vehicle");       sortedDict.Add(4, "AUV");       sortedDict.Add(5, "Hatchback");       sortedDict.Add(6, "Convertible");       Console.WriteLine("SortedDictionary key-value pairs...");       IDictionaryEnumerator demoEnum = sortedDict.GetEnumerator();       while (demoEnum.MoveNext())       Console.WriteLine("Key = " + demoEnum.Key + ", Value = " + demoEnum.Value);       Console.WriteLine("Count of SortedDictionary key-value pairs = "+sortedDict.Count);       sortedDict.Add(7, "Seven");       sortedDict.Add(8, "Eight");       Console.WriteLine("
SortedDictionary key-value pairs...UPDATED");       demoEnum = sortedDict.GetEnumerator();       while (demoEnum.MoveNext())       Console.WriteLine("Key = " + demoEnum.Key + ", Value = " + demoEnum.Value);       Console.WriteLine("Count of SortedDictionary key-value pairs (UPDATED) = "+sortedDict.Count);       Console.WriteLine("Value in the SortedDictionary key-value pair key five = "+sortedDict[5]);       sortedDict[5] = "Crossover";       Console.WriteLine("Value in the SortedDictionary key-value pair key five (updated) = "+sortedDict[5]);       sortedDict.Clear();       Console.WriteLine("
Count of SortedDictionary key-value pairs (UPDATED) = "+sortedDict.Count);    } }

Output

This will produce the following output −

SortedDictionary key-value pairs... Key = 1, Value = SUV Key = 2, Value = MUV Key = 3, Value = Utility Vehicle Key = 4, Value = AUV Key = 5, Value = Hatchback Key = 6, Value = Convertible Count of SortedDictionary key-value pairs = 6 SortedDictionary key-value pairs...UPDATED Key = 1, Value = SUV Key = 2, Value = MUV Key = 3, Value = Utility Vehicle Key = 4, Value = AUV Key = 5, Value = Hatchback Key = 6, Value = Convertible Key = 7, Value = Seven Key = 8, Value = Eight Count of SortedDictionary key-value pairs (UPDATED) = 8 Value in the SortedDictionary key-value pair key five = Hatchback Value in the SortedDictionary key-value pair key five (updated) = Crossover Count of SortedDictionary key-value pairs (UPDATED) = 0