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C# SortedSet Examples
Use the SortedSet type. This type is an optimized set collection.SortedSet. This is an ordered set collection. We have many elements and want to store them in a sorted order and also eliminate all duplicates from the data structure.
A generic. The SortedSet is part of the System.Collections.Generic namespace. Its performance tends to be worse than a hash table like Dictionary.HashSetSortedList
Add, remove. This program creates a new, empty SortedSet instance. Then it adds 4 elements to the set with the Add method. Next it removes one element with Remove.
Finally: It uses the SortedSet instance in foreach to loop through all the elements. They are stored alphabetically.
ForeachC# program that adds and removes elements
using System;
using System.Collections.Generic;
class Program
{
static void Main()
{
// Created sorted set of strings.
SortedSet<string> set = new SortedSet<string>();
// Add 4 elements.
set.Add("Codex");
set.Add("net");
set.Add("dot");
set.Add("sam");
// Remove an element.
set.Remove("sam");
// Print elements in set.
foreach (string val in set) // ... Alphabetical order.
{
Console.WriteLine(val);
}
}
}
Output
dot
net
Codex
Copy list. Often you may want to create a SortedSet instance from the elements in another collection, such as an array or List. You can do this with the SortedSet constructor.List
Note: In the example, the duplicate element ("Codex") is only present once in the SortedSet.
C# program that uses SortedSet constructor
using System;
using System.Collections.Generic;
class Program
{
static void Main()
{
// Create list with elements.
List<string> list = new List<string>();
list.Add("sam");
list.Add("allen");
list.Add("Codex");
list.Add("Codex");
// Created sorted set from list.
SortedSet<string> set = new SortedSet<string>(list);
// Display contents.
foreach (string val in set)
{
Console.WriteLine(val);
}
}
}
Output
allen
Codex
sam
RemoveWhere. Sometimes you may need to remove all elements from your SortedSet that match a certain condition. You can invoke the RemoveWhere method.
Here: In this example, four names are added to the SortedSet that start with the letter s.
Then: We call RemoveWhere with a lambda that is used as a predicate condition. When the method returns true, the element is removed.
C# program that uses RemoveWhere method
using System;
using System.Collections.Generic;
class Program
{
static void Main()
{
// Create sorted set.
SortedSet<string> set = new SortedSet<string>();
set.Add("sam");
set.Add("sally");
set.Add("sandra");
set.Add("steve");
set.Add("mark");
set.Add("mark");
// Remove all elements where first letter is "s".
set.RemoveWhere(element => element.StartsWith("s"));
// Display.
foreach (string val in set)
{
Console.WriteLine(val);
}
}
}
Output
mark
Add method. We call the Add method to put additional elements into the set. The Add method returns a boolean value that tells us whether or not a new element was added.
Result: If it returns true, a new element was added. If it returns false, the element already existed in the set and was not added again.
C# program that checks result of Add
using System;
using System.Collections.Generic;
class Program
{
static void Main()
{
// Test add method.
SortedSet<string> set = new SortedSet<string>();
bool a = set.Add("sam");
bool b = set.Add("sam");
bool c = set.Add("sam");
bool d = set.Add("mike");
Console.WriteLine("{0} {1} {2} {3}", a, b, c, d);
}
}
Output
True False False True
Count, clear. As with other collections, you can use the Count property and the Clear method on the SortedSet type. Please notice that the Count property can only be read, not assigned to.
Tip: After the Clear() method is called, the Count property will always return zero.
C# program that uses Count and Clear
using System;
using System.Collections.Generic;
class Program
{
static void Main()
{
SortedSet<string> set = new SortedSet<string>();
set.Add("a");
set.Add("z");
set.Add("a"); // Not successful.
Console.WriteLine(set.Count);
set.Clear();
Console.WriteLine(set.Count);
}
}
Output
2
0
UnionWith. This returns the union of two collections. If the set contains A, B and C, and the second collection contains C and D, the union will be equal to A, B, C and D.
Result: The UnionWith method adds all the elements into one collection. No duplicates will be found in the SortedSet.
C# program that uses UnionWith method
using System;
using System.Collections.Generic;
class Program
{
static void Main()
{
SortedSet<string> set = new SortedSet<string>();
set.Add("a");
set.Add("z");
set.Add("x");
List<string> list = new List<string>();
list.Add("a");
list.Add("y");
// Union the two collections.
set.UnionWith(list);
// Enumerate.
foreach (string val in set)
{
Console.WriteLine(val);
}
}
}
Output
a
x
y
z
SymmetricExceptWith. This returns all elements that are found in only one collection. If both contain "A," SymmetricExceptWith will remove "A" from the SortedSet instance.
Note: The SymmetricExceptWith method modifies the SortedSet in-place. You do not need to copy the variable reference.
Important: With SortedSet, some methods return a new SortedSet, and other modify the set in-place.
C# program that calls SymmetricExceptWith
using System;
using System.Collections.Generic;
class Program
{
static void Main()
{
SortedSet<string> set = new SortedSet<string>();
set.Add("a");
set.Add("z");
set.Add("x");
List<string> list = new List<string>();
list.Add("a");
list.Add("y");
// Determine symmetric set.
set.SymmetricExceptWith(list);
// Display elements.
foreach (string val in set)
{
Console.WriteLine(val);
}
}
}
Output
x
y
z
ExceptWith. This removes all elements found in a collection from the SortedSet. The resulting SortedSet will contain all its elements except those that were found in the other collection.
C# program that demonstrates ExceptWith
using System;
using System.Collections.Generic;
class Program
{
static void Main()
{
SortedSet<string> set = new SortedSet<string>();
set.Add("a");
set.Add("z");
set.Add("x");
List<string> list = new List<string>();
list.Add("a");
list.Add("x");
// Call ExceptWith to remove elements.
set.ExceptWith(list);
// Display elements.
foreach (string val in set)
{
Console.WriteLine(val);
}
}
}
Output
z
Overlaps. This tells us whether a collection has any elements in common with the SortedSet. Even if only one element is found in common, the result is True. Otherwise the result is False.
C# program that uses Overlaps method
using System;
using System.Collections.Generic;
class Program
{
static void Main()
{
SortedSet<string> set = new SortedSet<string>();
set.Add("a");
set.Add("z");
set.Add("x");
List<string> list = new List<string>();
list.Add("a");
list.Add("y");
HashSet<string> hash = new HashSet<string>();
hash.Add("v");
hash.Add("u");
bool a = set.Overlaps(list); // Set and list overlap.
bool b = set.Overlaps(hash); // Set and hash do not overlap.
Console.WriteLine(a);
Console.WriteLine(b);
}
}
Output
True
False
IntersectWith. This changes the set instance so that it contains only the elements that were present in both collections. The element count is reduced or stays the same.
C# program that calls IntersectWith method
using System;
using System.Collections.Generic;
class Program
{
static void Main()
{
var set = new SortedSet<string>();
set.Add("a");
set.Add("z");
set.Add("x");
var list = new List<string>();
list.Add("a");
list.Add("x");
// Compute intersection.
set.IntersectWith(list);
// Enumerate.
foreach (string val in set)
{
Console.WriteLine(val);
}
}
}
Output
a
x
Min, max. The SortedSet contains elements that are stored in ascending sorted order. So it is trivial for the set to compute its lowest and highest values.
Also: You cannot use an indexer with the SortedSet, so these properties are useful.
C# program that demonstrates Min and Max properties
using System;
using System.Collections.Generic;
class Program
{
static void Main()
{
// Three-element set.
var set = new SortedSet<string>();
set.Add("a");
set.Add("z");
set.Add("x");
// Write Min and Max.
Console.WriteLine(set.Min);
Console.WriteLine(set.Max);
}
}
Output
a
zSubsets, supersets. SortedSet has methods to compute subsets and supersets. These are IsSubsetOf, IsSupersetOf, IsProperSubsetOf and IsProperSupersetOf.
Definitions: A subset is contained entirely inside another set. A superset contains entirely another set.
Note: Proper subsets and supersets cannot have the same number of elements. They must have at least one fewer.
Math: Please visit the Wolfram link for information on set theory and proper subsets.
Proper Subset: wolfram.comC# program that uses IsSubsetOf, IsSupersetOf
using System;
using System.Collections.Generic;
class Program
{
static void Main()
{
var set = new SortedSet<string>();
set.Add("a");
set.Add("z");
set.Add("x");
var list1 = new List<string>();
list1.Add("a");
list1.Add("z");
list1.Add("x");
var list2 = new List<string>();
list2.Add("a");
list2.Add("z");
list2.Add("x");
list2.Add("y");
Console.WriteLine("IsProperSubsetOf: {0}", set.IsProperSubsetOf(list1));
Console.WriteLine("IsSubsetOf: {0}", set.IsSubsetOf(list1));
Console.WriteLine("IsProperSubsetOf: {0}", set.IsProperSubsetOf(list2));
Console.WriteLine("IsSubsetOf: {0}", set.IsSubsetOf(list2));
var list3 = new List<string>();
list3.Add("a");
list3.Add("z");
Console.WriteLine("IsProperSupersetOf: {0}", set.IsProperSupersetOf(list3));
Console.WriteLine("IsSupersetOf: {0}", set.IsSupersetOf(list3));
}
}
Output
IsProperSubsetOf: False
IsSubsetOf: True
IsProperSubsetOf: True
IsSubsetOf: True
IsProperSupersetOf: True
IsSupersetOf: TrueSetEquals. This tells us if 2 collections have the same elements. In my testing, I found that the SetEquals method treats the second collection as though it has no duplicate elements.
Note: If duplicate elements are present, the 2 collections may still be considered equal.
C# program that demonstrates SetEquals method
using System;
using System.Collections.Generic;
class Program
{
static void Main()
{
var set = new SortedSet<string>();
set.Add("s");
set.Add("a");
set.Add("m");
var list = new List<string>();
list.Add("s");
list.Add("a");
list.Add("m");
// See if the 2 collections contain the same elements.
bool a = set.SetEquals(list);
Console.WriteLine(a);
}
}
Output
TrueGetViewBetween. How can you see what elements a SortedSet instance contains between and including 2 values? You can use GetViewBetween with 2 arguments: the minimum and maximum values.
Then: You can loop over the SortedSet that is returned in a foreach-loop, or do further operations as needed.
C# program that calls GetViewBetween method
using System;
using System.Collections.Generic;
class Program
{
static void Main()
{
var set = new SortedSet<int>();
set.Add(5);
set.Add(7);
set.Add(8);
set.Add(9);
set.Add(4);
// Call GetViewBetween method.
SortedSet<int> view = set.GetViewBetween(4, 7);
foreach (int val in view)
{
Console.WriteLine(val);
}
}
}
Output
4
5
7Contains. If you need to determine if your SortedSet has a certain element in it, you could use a foreach-loop and imperatively scan all the elements. However, Contains is clearer.
C# program that demonstrates Contains method
using System;
using System.Collections.Generic;
class Program
{
static void Main()
{
var set = new SortedSet<int>();
set.Add(8);
set.Add(7);
set.Add(8);
set.Add(9);
set.Add(3);
// Use Contains method.
bool a = set.Contains(9);
Console.WriteLine(a);
}
}
Output
TrueAdd. When you add elements to your SortedSet, they are automatically stored in ascending order: lowest to highest values. With Reverse() we get the elements in the opposite, reverse order.
And: If you want to loop over your SortedSet from highest to lowest (reverse alphabetical order), you can call Reverse in a foreach-loop.
C# program that uses Reverse method on SortedSet
using System;
using System.Collections.Generic;
class Program
{
static void Main()
{
var set = new SortedSet<int>();
set.Add(8);
set.Add(7);
set.Add(8);
set.Add(9);
set.Add(3);
foreach (int val in set)
{
Console.Write(val);
Console.Write(' ');
}
Console.WriteLine();
// Use Reverse.
foreach (int val in set.Reverse())
{
Console.Write(val);
Console.Write(' ');
}
Console.WriteLine();
}
}
Output
3 7 8 9
9 8 7 3Performance. Is SortedSet efficient? This depends of course on your program. A key point is that the SortedSet does not include hashing. To look up a node, a logarithmic search is needed.
Therefore, SortedSet is slower than HashSet for lookups. In micro-benchmarks, SortedSet is much slower than HashSet, but in real programs this difference may not be relevant.
Internally, the SortedSet is implemented as a tree with a Root, Left and Right node on every node instance. Every node is allocated on the managed heap. This reduces performance.
Hashing: For most programs a hashing mechanism (such as that found in Dictionary and HashSet) is superior for performance.
DictionaryCredit: Thanks to Mark Minich for helping clarify the performance information. SortedSet has a logarithmic search.
A summary. SortedSet can replace confusing, custom types with a simple type. This reduces program complexity. SortedSet is an interesting combination of HashSet and SortedList.
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- C# AggressiveInlining: MethodImpl Attribute
- C# Anagram Method
- C# And Bitwise Operator
- C# Anonymous Function (Delegate With No Name)
- C# Any Method, Returns True If Match Exists
- C# StringBuilder Append and AppendLine
- C# StringBuilder AppendFormat
- ASP.NET appSettings Example
- C# ArgumentException: Invalid Arguments
- C# Array.ConvertAll, Change Type of Elements
- C# Array.Copy Examples
- C# Array.CreateInstance Method
- C# Array and Dictionary Test, Integer Lookups
- C# Array.Exists Method, Search Arrays
- C# Array.Find Examples, Search Array With Lambda
- C# Array.ForEach: Use Lambda on Every Element
- C# Array Versus List Memory Usage
- C# Array Property, Return Empty Array
- C# CharEnumerator
- C# Chart, Windows Forms (Series and Points)
- C# CheckBox: Windows Forms
- C# class Examples
- C# Clear Dictionary: Remove All Keys
- C# Clone Examples: ICloneable Interface
- C# Closest Date (Find Dates Nearest in Time)
- C# Combine Arrays: List, Array.Copy and Buffer.BlockCopy
- C# Combine Dictionary Keys
- C# ComboBox: Windows Forms
- C# CompareTo Int Method
- C# Comparison Object, Used With Array.Sort
- C# Compress Data: GZIP
- C# Console.Read Method
- C# Console.ReadKey Example
- C# Console.ReadLine Example (While Loop)
- C# Console.SetOut and Console.SetIn
- C# Console.WindowHeight
- C# Console.Write, Append With No Newline
- C# Console.WriteLine (Print)
- C# const Example
- C# Constraint Puzzle Solver
- C# Count Characters in String
- C# Count, Dictionary (Get Number of Keys)
- C# Count Letter Frequencies
- C# Count Extension Method: Use Lambda to Count
- C# CSV Methods (Parse and Segment)
- C# DataRow Field Method: Cast DataTable Cell
- C# Get Day Count Elapsed From DateTime
- C# DateTime Format
- C# DateTime.Now (Current Time)
- C# DateTime.Today (Current Day With Zero Time)
- C# DateTime.TryParse and TryParseExact
- C# DateTime Examples
- C# DateTimePicker Example
- C# Debug.Write Examples
- C# Visual Studio Debugging Tutorial
- C# decimal Examples
- C# DayOfWeek
- C# Enum.Format Method (typeof Enum)
- C# Enum.GetName, GetNames: Get String Array From Enum
- C# Enum.Parse, TryParse: Convert String to Enum
- C# Error and Warning Directives
- C# ErrorProvider Control: Windows Forms
- C# event Examples
- C# Get Every Nth Element From List (Modulo)
- C# Excel Interop Example
- C# Except (Remove Elements From Collection)
- C# Extension Method
- C# extern alias Example
- C# Convert Feet, Inches
- C# File.Delete
- C# File Equals: Compare Files
- C# File.Exists Method
- C# try Keyword
- C# TryGetValue (Get Value From Dictionary)
- C# Tuple Examples
- C# Type Class: Returned by typeof, GetType
- C# TypeInitializationException
- C# Union: Combine and Remove Duplicate Elements
- C# Unreachable Code Detected
- C# Unsafe Keyword: Fixed, Pointers
- C# Uppercase First Letter
- C# Uri and UriBuilder Classes
- C# Using Alias Example
- C# using Statement: Dispose and IDisposable
- C# value Keyword
- C# ValueTuple Examples (System.ValueTuple, ToTuple)
- C# ValueType Examples
- C# Variable Initializer for Class Field
- C# Word Count
- C# Word Interop: Microsoft.Office.Interop.Word
- C# XElement Example (XElement.Load, XName)
- C# Zip Method (Use Lambda on Two Collections)
- C# File.Move Method, Rename File
- C# File.Open Examples
- C# File.ReadAllBytes, Get Byte Array From File
- C# File.ReadAllLines, Get String Array From File
- C# File.ReadAllText, Get String From File
- C# File.ReadLines, Use foreach Over Strings
- C# File.Replace Method
- C# FileInfo Length, Get File Size
- C# FileInfo Examples
- C# File Handling
- C# Filename With Date Example (DateTime.Now)
- C# FileNotFoundException (catch Example)
- C# FileStream Length, Get Byte Count From File
- C# FileStream Example, File.Create
- C# FileSystemWatcher Tutorial (Changed, e.Name)
- C# finally Keyword
- C# First Sentence
- C# FirstOrDefault (Get First Element If It Exists)
- C# Fisher Yates Shuffle: Generic Method
- C# fixed Keyword (unsafe)
- C# Flatten Array (Convert 2D to 1D)
- C# First Words in String
- C# First (Get Matching Element With Lambda)
- C# ContainsKey Method (Key Exists in Dictionary)
- C# Convert ArrayList to Array (Use ToArray)
- C# Convert ArrayList to List
- C# Convert Bool to Int
- C# Convert Bytes to Megabytes
- C# Convert Degrees Celsius to Fahrenheit
- C# Convert Dictionary to List
- C# Convert Dictionary to String (Write to File)
- C# Convert List to Array
- C# Convert List to DataTable (DataGridView)
- C# Convert List to String
- C# Convert Miles to Kilometers
- C# Convert Milliseconds, Seconds, Minutes
- C# Convert Nanoseconds, Microseconds, Milliseconds
- C# Convert String Array to String
- C# Convert TimeSpan to Long
- C# Convert Types
- C# Copy Dictionary
- C# Count Elements in Array and List
- C# FromOADate and Excel Dates
- C# Generic Class, Generic Method Examples
- C# GetEnumerator: While MoveNext, Get Current
- C# GetHashCode (String Method)
- C# Thumbnail Image With GetThumbnailImage
- C# GetType Method
- C# Global Variable Examples (Public Static Property)
- ASP.NET Global Variables Example
- C# Group By Operator: LINQ
- GroupBox: Windows Forms
- C# GroupBy Method: LINQ
- C# GroupJoin Method
- C# GZipStream Example (DeflateStream)
- C# HashSet Examples
- C# Hashtable Examples
- HelpProvider Control Use
- C# HTML and XML Handling
- C# HtmlEncode and HtmlDecode
- C# HtmlTextWriter Example
- C# HttpUtility.HtmlEncode Methods
- C# HybridDictionary
- C# default Operator
- C# DefaultIfEmpty Method
- C# Define and Undef Directives
- C# Destructor
- C# DialogResult: Windows Forms
- C# Dictionary, Read and Write Binary File
- C# Dictionary Memory
- C# Dictionary Optimization, Increase Capacity
- C# Dictionary Optimization, Test With ContainsKey
- C# DictionaryEntry Example (Hashtable)
- C# Directives
- C# Directory.CreateDirectory, Create New Folder
- C# Directory.GetFiles Example (Get List of Files)
- C# DivideByZeroException
- C# DllImport Attribute
- C# Do While Loop Example
- C# DriveInfo Examples
- C# DropDownItems Control
- C# IComparable Example, CompareTo: Sort Objects
- C# IDictionary Generic Interface
- C# IEnumerable Examples
- C# IList Generic Interface: List and Array
- C# Image Type
- C# ImageList Use: Windows Forms
- C# Increment String That Contains a Number
- C# Increment, Preincrement and Decrement Ints
- Dot Net Perls
- C# Indexer Examples (This Keyword, get and set)
- C# IndexOutOfRangeException
- C# Inheritance
- C# Insert String Examples
- C# int Array
- C# Interface Examples
- C# Interlocked Examples: Add, CompareExchange
- C# Intersect: Get Common Elements
- C# InvalidCastException
- C# InvalidOperationException: Collection Was Modified
- C# IOException Type: File, Directory Not Found
- C# IOrderedEnumerable (Query Expression With orderby)
- C# is: Cast Examples
- C# IsFixedSize, IsReadOnly and IsSynchronized Arrays
- C# string.IsNullOrEmpty, IsNullOrWhiteSpace
- C# IsSorted Method: If Array Is Already Sorted
- C# Jagged Array Examples
- C# join Examples (LINQ)
- C# KeyCode Property and KeyDown
- C# KeyNotFoundException: Key Not Present in Dictionary
- C# KeyValuePair Examples
- C# Line Count for File
- C# Line Directive
- C# LinkedList
- C# List CopyTo (Copy List Elements to Array)
- C# List Equals (If Elements Are the Same)
- C# List Find and Exists Examples
- C# List Insert Performance
- ASP.NET LiteralControl Example
- C# Locality Optimizations (Memory Hierarchy)
- C# lock Keyword
- C# Long and ulong Types
- C# Loop Over String Chars: Foreach, For
- C# Loop Over String Array
- C# Main args Examples
- C# Map Example
- ASP.NET MapPath: Virtual and Physical Paths
- C# Mask Optimization
- C# MaskedTextBox Example
- C# Math.Abs: Absolute Value
- C# Math.Ceiling Usage
- C# Math.Floor Method
- C# Math.Max and Math.Min Examples
- C# Math.Pow Method, Exponents
- C# Math.Round Examples: MidpointRounding
- C# Math Type
- C# Max and Min: Get Highest or Lowest Element
- C# MemoryFailPoint and InsufficientMemoryException
- C# MemoryStream: Use Stream on Byte Array
- C# MenuStrip: Windows Forms
- C# Modulo Operator: Get Remainder From Division
- C# MonthCalendar Control: Windows Forms
- C# Multiple Return Values
- C# Multiply Numbers
- C# namespace Keyword
- C# NameValueCollection Usage
- C# Nested Lists: Create 2D List or Jagged List
- C# Nested Switch Statement
- C# Environment.NewLine
- C# Normalize, IsNormalized Methods
- C# Null String Example
- C# null Keyword
- C# Nullable Examples
- C# NullReferenceException and Null Parameter
- C# Object Array
- C# Obsolete Attribute
- C# OfType Examples
- C# OpenFileDialog Example
- C# operator Keyword
- C# Odd and Even Numbers
- C# Bitwise Or
- C# orderby Query Keyword
- C# out Parameter
- C# OutOfMemoryException
- C# OverflowException
- C# Overload Method
- C# Override Method
- C# PadRight and PadLeft: String Columns
- C# Get Paragraph From HTML With Regex
- C# Parallel.For Example (Benchmark)
- C# Parallel.Invoke: Run Methods on Separate Threads
- C# Parameter Optimization
- C# Parameter Passing, ref and out
- C# params Keyword
- C# int.Parse: Convert Strings to Integers
- C# partial Keyword
- C# Path.ChangeExtension
- C# Path Exists Example
- C# Path.GetExtension: File Extension
- C# Path.GetRandomFileName Method
- C# Pragma Directive
- C# Predicate (Lambda That Returns True or False)
- C# Pretty Date Format (Hours or Minutes Ago)
- C# PreviewKeyDown Event
- C# Random Lowercase Letter
- C# Random Paragraphs and Sentences
- C# Random String
- C# Random Number Examples
- C# StreamReader ReadLine, ReadLineAsync Examples
- C# readonly Keyword
- C# Recursion Example
- C# Regex, Read and Match File Lines
- C# Regex Groups, Named Group Example
- C# Regex.Matches Quote Example
- C# Regex.Matches Method: foreach Match, Capture
- C# Regex.Replace, Matching End of String
- C# Regex.Replace, Remove Numbers From String
- C# Regex.Replace, Merge Multiple Spaces
- C# Regex.Replace Examples: MatchEvaluator
- C# Regex.Split, Get Numbers From String
- C# Regex.Split Examples
- C# Regex Trim, Remove Start and End Spaces
- C# RegexOptions.Compiled
- C# RegexOptions.IgnoreCase Example
- C# RegexOptions.Multiline
- C# Region and endregion
- C# Remove Char From String at Index
- C# Remove Element
- C# Remove HTML Tags
- C# Remove String
- C# Reserved Filenames
- C# return Keyword
- C# Reverse String
- C# Reverse Words
- C# Reverse Extension Method
- C# RichTextBox Example
- C# Right String Part
- C# RNGCryptoServiceProvider Example
- C# ROT13 Method, Char Lookup Table
- C# SelectMany Example: LINQ
- C# Sentinel Optimization
- C# SequenceEqual Method (If Two Arrays Are Equal)
- C# Shift Operators (Bitwise)
- C# Short and ushort Types
- C# Single Method: Get Element If Only One Matches
- C# SingleOrDefault
- C# Singleton Pattern Versus Static Class
- C# Singleton Class
- C# sizeof Keyword
- C# Skip and SkipWhile Examples
- C# Sleep Method (Pause)
- C# Sort Dictionary: Keys and Values
- C# Sort by File Size
- C# Sort, Ignore Leading Chars
- C# Sort KeyValuePair List: CompareTo
- C# Sort Strings by Length
- C# Thread.SpinWait Example
- C# Math.Sqrt Method
- C# stackalloc Operator
- C# StackOverflowException
- C# StartsWith and EndsWith String Methods
- C# Static Array
- C# Static Dictionary
- C# Stopwatch Examples
- C# Stream
- C# StreamReader ReadToEnd Example (Read Entire File)
- C# StreamReader ReadToEndAsync Example (Performance)
- C# StreamReader Examples
- C# StreamWriter Examples
- C# String Append (Add Strings)
- C# String Compare and CompareTo Methods
- C# String Constructor (new string)
- C# string.Copy Method
- C# CopyTo String Method: Put Chars in Array
- C# Empty String Examples
- C# String Equals Examples
- C# String For Loop, Count Spaces in String
- C# string.Intern and IsInterned
- C# String IsUpper, IsLower
- C# String Length Property: Get Character Count
- C# String Literal: Newline and Quote Examples
- C# StringBuilder Capacity
- C# StringBuilder Clear (Set Length to Zero)
- C# StringBuilder Data Types
- C# StringBuilder Performance
- C# StringBuilder Equals (If Chars Are Equal)
- C# StringBuilder Memory
- C# StringBuilder ToString: Get String From StringBuilder
- C# StringWriter Class
- C# Sum Method: Add up All Numbers
- C# Switch Char, Test Chars With Cases
- C# Switch Enum
- C# System (using System namespace)
- C# Tag Property: Windows Forms
- C# TextInfo Examples
- C# TextReader, Returned by File.OpenText
- C# TextWriter, Returned by File.CreateText
- C# this Keyword
- C# ThreadPool
- C# Thread Join Method (Join Array of Threads)
- C# ThreadPool.SetMinThreads Method
- C# TimeZone Examples
- C# Get Title From HTML With Regex
- C# ToArray Extension Method
- C# ToCharArray: Convert String to Array
- C# ToDictionary Method
- C# Token
- C# ToList Extension Method
- C# ToLookup Method (Get ILookup)
- C# ToLower and ToUpper: Uppercase and Lowercase Strings
- ToolStripContainer Control: Dock, Properties
- C# ToolTip: Windows Forms
- C# ToString Integer Optimization
- C# ToString: Get String From Object
- C# ToTitleCase Method
- C# TrackBar: Windows Forms
- C# Tree and Nodes Example: Directed Acyclic Word Graph
- C# TreeView Tutorial
- C# Trim Strings
- C# Thread Methods
- C# History
- C# Features
- C# Variables
- C# Data Types
- C# Operators
- C# Keywords
- C# New Features | C# Version Features
- C# Programs
- C# Program to swap numbers without third variable
- C# Program to convert Decimal to Binary
- C# Program to Convert Number in Characters
- C# Program to Print Alphabet Triangle
- C# Program to print Number Triangle
- C# Program to generate Fibonacci Triangle
- C# String Compare() method
- C# String CompareOrdinal() method
- C# String CompareTo() method
- C# String Concat() method
- C# String Contains() method
- C# String CopyTo() method
- C# String EndsWith() method
- C# String Equals() method
- C# String Format() method
- C# String IndexOf() method
- C# String Insert() method
- C# String Intern(String str) method
- C# String IsInterned() method
- C# String Normalize() method
- C# String IsNullOrEmpty() method
- C# String IsNullOrWhiteSpace() method
- C# String Join() method
- C# String LastIndexOf() method
- C# String LastIndexOfAny() method
- C# String PadLeft() method
- C# String PadRight() method
- C# Nullable
- C# String Remove() method
- C# String Replace() method
- C# String Split() method
- C# String StartsWith() method
- C# String SubString() method
- C# Partial Types
- C# Iterators
- C# Delegate Covariance
- C# Delegate Inference
- C# Anonymous Types
- C# Extension Methods
- C# Query Expression
- C# Partial Method
- C# Implicitly Typed Local Variable
- C# Object and Collection Initializer
- C# Auto Implemented Properties
- C# Dynamic Binding
- C# Named and Optional Arguments
- C# Asynchronous Methods
- C# Caller Info Attributes
- C# Using Static Directive
- C# Exception Filters
- C# Await in Catch Finally Blocks
- C# Default Values for Getter Only Properties
- C# Expression Bodied Members
- C# Null Propagator
- C# String Interpolation
- C# nameof operator
- C# Dictionary Initializer
- C# Pattern Matching
- C# Tuples
- C# Deconstruction
- C# Local Functions
- C# Binary Literals
- C# Ref Returns and Locals
- C# Expression Bodied Constructors and Finalizers
- C# Expression Bodied Getters and Setters
- C# Async Main
- C# Default Expression