Generic Collection with Hashset and Sorted List in C#

C# supports powerful generic collections like HashSet for unique unordered elements and SortedList for sorted key-value pairs. HashSet ensures uniqueness, while SortedList maintains sorted order based on keys, offering efficient data management in diverse scenarios.

Collections

C# includes various classes that store the values or objects called collections.

There are two types of collections available in C#

Non-generic collections and Generic collections

The System. The collections namespace contains the non-generic collection types and systems.Collections.Generic namespace includes generic collection types.

In most cases, it is recommended to use the generic collections because they perform faster than non-generic collections and also minimize exceptions by giving compile-time errors.

Generic Collections

• HashSet
• Sorted List
• Dictionary
• List

HashSet

It is a collection of unique elements. if you add duplicate data, then it shows only one unique value inside the collection.

HashSet<string> myhash1 = new HashSet<string>();

// Add the elements in HashSet
// Using Add method
myhash1.Add("C");
myhash1.Add("C++");
myhash1.Add("C#");
myhash1.Add("Java");
myhash1.Add("Ruby");
Console.WriteLine("Elements of myhash1:");

// Accessing elements of HashSet
// Using foreach loop
foreach(var val in myhash1)
{
    Console.WriteLine(val);
}

Access single elements

if (myhash1.Count > 0)
    Console.WriteLine(myhash1.ToList()[1]);

Remove element

myhash.Remove("Ruby");

Sorted list

It is a collection of key/value pairs that are sorted according to keys. By default, this collection sorts the key/value pairs in ascending order.

Syntax

SortedList list_name = new SortedList();

Example

SortedList my_slist1 = new SortedList();

// Adding key/value pairs in 
// SortedList using Add() method
my_slist1.Add(1.02, "This");
my_slist1.Add(1.07, "Is");
my_slist1.Add(1.04, "SortedList");
my_slist1.Add(1.01, "Tutorial");

Happy Coding!

Thanks.