C# impact and status on Exercism

186,720 students

About C#

Learn

Practice

975 contributors

1961 mentors

C# Track Management

This page provides the Exercism community with the information and tools needed to manage the C# track.

Students

186,720

Submissions

6,051,745

Mentoring Discussions

22,627

The C# track is exemplar ✨

Building

C# syllabus

Learn More

Help create the track syllabus: is a set of concepts and learning exercises put together to teach foundational elements of the programming language.

62 concepts being taught

Arrays

16,283 learnt

For Loops

16,283 learnt

Foreach Loops

16,283 learnt

Basics

48,751 learnt

Booleans

34,938 learnt

Casting

5,968 learnt

Chars

8,524 learnt

String Builder

8,524 learnt

Classes

15,210 learnt

Constants

2,715 learnt

Defensive Copying

2,715 learnt

Readonly Collections

2,715 learnt

Constructors

9,910 learnt

Datetimes

8,715 learnt

Dictionaries

5,938 learnt

Enums

5,033 learnt

Equality

2,818 learnt

Sets

2,818 learnt

Exceptions

4,573 learnt

Conditionals Ternary

3,049 learnt

Expression Bodied Members

3,049 learnt

Switch Expressions

3,049 learnt

Throw Expressions

3,049 learnt

Attributes

2,875 learnt

Flag Enums

2,875 learnt

Do While Loops

13,222 learnt

Floating Point Numbers

13,222 learnt

While Loops

13,222 learnt

Inheritance

7,097 learnt

Integral Numbers

3,783 learnt

Interfaces

2,970 learnt

Ordering

2,970 learnt

Generic Types

6,900 learnt

Lists

6,900 learnt

Method Overloading

2,660 learnt

Named Arguments

2,660 learnt

Optional Parameters

2,660 learnt

Namespaces

1,637 learnt

Nested Types

1,645 learnt

Nullability

10,183 learnt

If Statements

21,429 learnt

Numbers

21,429 learnt

Object Initializers

2,384 learnt

Operator Overloading

1,923 learnt

Overflow

2,430 learnt

Parameters

1,978 learnt

Properties

3,264 learnt

Randomness

10,692 learnt

Regular Expressions

1,519 learnt

Resource Cleanup

2,271 learnt

Resource Lifetime

1,822 learnt

String Formatting

1,929 learnt

Verbatim Strings

1,929 learnt

Strings

23,562 learnt

Structs

1,664 learnt

Switch Statements

4,671 learnt

Time

2,389 learnt

Timezone

2,389 learnt

Tuples

12,441 learnt

Exception Filtering

1,542 learnt

User Defined Exceptions

1,542 learnt

Extension Methods

12,454 learnt

42 active learning exercises

Started

Attempts

Completions

Mentoring requests

Bird Watcher

24,994

264,383 (avg. 10.6)

16,283 (65.1%)

231 (0.9%)

Lucian's Luscious Lasagna

71,600

397,080 (avg. 5.5)

48,751 (68.1%)

445 (0.6%)

Annalyn's Infiltration

42,683

386,640 (avg. 9.1)

34,938 (81.9%)

402 (0.9%)

Secure Munchester United

7,018

49,703 (avg. 7.1)

5,968 (85.0%)

47 (0.7%)

Squeaky Clean

11,394

224,324 (avg. 19.7)

8,524 (74.8%)

158 (1.4%)

Jedlik's Toys

16,604

168,613 (avg. 10.2)

15,210 (91.6%)

126 (0.8%)

Authentication System

3,553

37,200 (avg. 10.5)

2,715 (76.4%)

23 (0.6%)

Need for Speed

11,157

169,893 (avg. 15.2)

9,910 (88.8%)

104 (0.9%)

Booking up for Beauty

9,706

109,319 (avg. 11.3)

8,715 (89.8%)

58 (0.6%)

International Calling Connoisseur

6,377

81,312 (avg. 12.8)

5,938 (93.1%)

46 (0.7%)

Logs, Logs, Logs!

5,376

45,232 (avg. 8.4)

5,033 (93.6%)

27 (0.5%)

Face ID 2.0

3,345

40,419 (avg. 12.1)

2,818 (84.2%)

34 (1.0%)

Calculator Conundrum

4,857

39,506 (avg. 8.1)

4,573 (94.2%)

39 (0.8%)

The Weather in Deather

3,363

21,366 (avg. 6.4)

3,049 (90.7%)

37 (1.1%)

Attack of the Trolls

3,195

32,259 (avg. 10.1)

2,875 (90.0%)

19 (0.6%)

Interest is Interesting

14,816

191,355 (avg. 12.9)

13,222 (89.2%)

108 (0.7%)

Wizards and Warriors

7,768

65,722 (avg. 8.5)

7,097 (91.4%)

62 (0.8%)

Hyper-optimized Telemetry

5,942

80,177 (avg. 13.5)

3,783 (63.7%)

65 (1.1%)

Remote Control Competition

3,290

32,555 (avg. 9.9)

2,970 (90.3%)

25 (0.8%)

Tracks on Tracks on Tracks

7,385

112,536 (avg. 15.2)

6,900 (93.4%)

59 (0.8%)

Wizards and Warriors 2.0

2,820

20,012 (avg. 7.1)

2,660 (94.3%)

18 (0.6%)

Red vs. Blue: Darwin Style

1,802

9,092 (avg. 5.0)

1,637 (90.8%)

4 (0.2%)

Remote Control Cleanup

1,936

19,691 (avg. 10.2)

1,645 (85.0%)

20 (1.0%)

Tim from Marketing

10,760

82,987 (avg. 7.7)

10,183 (94.6%)

90 (0.8%)

Cars, Assemble!

23,664

228,055 (avg. 9.6)

21,429 (90.6%)

188 (0.8%)

Developer Privileges

2,595

17,693 (avg. 6.8)

2,384 (91.9%)

15 (0.6%)

Hyperia Forex

2,095

18,294 (avg. 8.7)

1,923 (91.8%)

20 (1.0%)

Hyperinflation Hits Hyperia

2,553

17,148 (avg. 6.7)

2,430 (95.2%)

13 (0.5%)

Building Telemetry

2,145

18,107 (avg. 8.4)

1,978 (92.2%)

10 (0.5%)

Weighing Machine

3,534

52,524 (avg. 14.9)

3,264 (92.4%)

23 (0.7%)

Roll the Die!

11,242

55,424 (avg. 4.9)

10,692 (95.1%)

65 (0.6%)

Parsing Log Files

1,731

26,181 (avg. 15.1)

1,519 (87.8%)

12 (0.7%)

Object Relational Mapping

2,630

25,010 (avg. 9.5)

2,271 (86.3%)

15 (0.6%)

Orm in One Go

1,958

11,136 (avg. 5.7)

1,822 (93.1%)

15 (0.8%)

High School Sweethearts

2,098

32,801 (avg. 15.6)

1,929 (91.9%)

8 (0.4%)

Log Levels

30,960

371,439 (avg. 12.0)

23,562 (76.1%)

363 (1.2%)

Land Grab in Space

1,831

16,704 (avg. 9.1)

1,664 (90.9%)

20 (1.1%)

Football Match Reports

5,016

93,052 (avg. 18.6)

4,671 (93.1%)

44 (0.9%)

Beauty Salon Goes Global

2,941

46,801 (avg. 15.9)

2,389 (81.2%)

29 (1.0%)

Phone Number Analysis

13,727

95,683 (avg. 7.0)

12,441 (90.6%)

106 (0.8%)

Instruments of Texas

1,712

14,139 (avg. 8.3)

1,542 (90.1%)

18 (1.1%)

Log Analysis

15,513

212,531 (avg. 13.7)

12,454 (80.3%)

149 (1.0%)

Practice Exercises

Learn More

Practice Exercises are exercises designed to allow students to solve an arbitrary problem, with the aim of them making use of the concepts they have learned so far.

Synced primary repo: 70c7481992b8d74961a33872404a4ebb2f0b5e5b (Updates should be instant)

Next goal: Implement 138 practice exercises. Find out more.

136 active practice exercises

Started

Attempts

Completions

Mentoring requests

Hello World

154,807

425,159 (avg. 2.7)

101,710 (65.7%)

32 (0.0%)

Two Fer

9,261

17,480 (avg. 1.9)

7,308 (78.9%)

2,597 (28.0%)

Leap

19,572

79,532 (avg. 4.1)

17,691 (90.4%)

2,452 (12.5%)

Line Up

1,644

9,996 (avg. 6.1)

1,456 (88.6%)

28 (1.7%)

Gigasecond

7,889

15,031 (avg. 1.9)

6,928 (87.8%)

834 (10.6%)

Resistor Color

7,751

29,807 (avg. 3.8)

6,802 (87.8%)

1,641 (21.2%)

Space Age

7,442

33,698 (avg. 4.5)

6,521 (87.6%)

1,275 (17.1%)

High Scores

4,113

14,989 (avg. 3.6)

3,451 (83.9%)

974 (23.7%)

Hamming

5,136

13,326 (avg. 2.6)

4,602 (89.6%)

934 (18.2%)

Nucleotide Count

4,212

11,956 (avg. 2.8)

3,841 (91.2%)

865 (20.5%)

Robot Name

5,304

44,328 (avg. 8.4)

3,923 (74.0%)

738 (13.9%)

Allergies

3,420

16,058 (avg. 4.7)

2,628 (76.8%)

459 (13.4%)

Grade School

3,154

14,903 (avg. 4.7)

2,637 (83.6%)

406 (12.9%)

Rotational Cipher

4,202

31,840 (avg. 7.6)

3,474 (82.7%)

355 (8.4%)

Circular Buffer

2,187

14,197 (avg. 6.5)

1,641 (75.0%)

242 (11.1%)

Clock

2,154

16,192 (avg. 7.5)

1,669 (77.5%)

233 (10.8%)

Bob

11,005

172,632 (avg. 15.7)

8,790 (79.9%)

859 (7.8%)

Matching Brackets

1,820

12,630 (avg. 6.9)

1,475 (81.0%)

180 (9.9%)

Spiral Matrix

2,345

16,897 (avg. 7.2)

1,727 (73.6%)

134 (5.7%)

Tournament

1,256

10,464 (avg. 8.3)

879 (70.0%)

96 (7.6%)

Variable Length Quantity

848

5,009 (avg. 5.9)

535 (63.1%)

54 (6.4%)

Dominoes

4,281

37,082 (avg. 8.7)

1,479 (34.5%)

89 (2.1%)

Forth

621

6,151 (avg. 9.9)

331 (53.3%)

28 (4.5%)

Pangram

6,702

23,643 (avg. 3.5)

5,597 (83.5%)

324 (4.8%)

Isogram

4,680

19,955 (avg. 4.3)

4,210 (90.0%)

183 (3.9%)

Acronym

3,748

19,784 (avg. 5.3)

3,245 (86.6%)

185 (4.9%)

Grains

2,817

8,905 (avg. 3.2)

2,462 (87.4%)

106 (3.8%)

Perfect Numbers

2,431

8,647 (avg. 3.6)

2,177 (89.6%)

81 (3.3%)

Collatz Conjecture

3,111

10,169 (avg. 3.3)

2,880 (92.6%)

92 (3.0%)

Phone Number

2,425

14,616 (avg. 6.0)

2,033 (83.8%)

68 (2.8%)

Scrabble Score

4,678

25,581 (avg. 5.5)

4,053 (86.6%)

132 (2.8%)

Meetup

2,045

9,779 (avg. 4.8)

1,472 (72.0%)

44 (2.2%)

Difference of Squares

7,967

42,246 (avg. 5.3)

6,940 (87.1%)

169 (2.1%)

Resistor Color Duo

2,827

15,029 (avg. 5.3)

2,636 (93.2%)

41 (1.5%)

Resistor Color Trio

998

6,610 (avg. 6.6)

908 (91.0%)

7 (0.7%)

Series

2,247

8,841 (avg. 3.9)

1,962 (87.3%)

92 (4.1%)

Sum of Multiples

5,357

30,837 (avg. 5.8)

4,372 (81.6%)

305 (5.7%)

Accumulate

3,559

10,519 (avg. 3.0)

2,926 (82.2%)

135 (3.8%)

All Your Base

1,171

7,015 (avg. 6.0)

883 (75.4%)

22 (1.9%)

Largest Series Product

1,109

4,673 (avg. 4.2)

933 (84.1%)

18 (1.6%)

Pascal's Triangle

1,228

5,140 (avg. 4.2)

971 (79.1%)

22 (1.8%)

Prime Factors

1,237

4,301 (avg. 3.5)

1,086 (87.8%)

19 (1.5%)

Pythagorean Triplet

3,469

22,958 (avg. 6.6)

2,356 (67.9%)

64 (1.8%)

Armstrong Numbers

1,976

6,857 (avg. 3.5)

1,787 (90.4%)

46 (2.3%)

Darts

6,068

36,338 (avg. 6.0)

5,299 (87.3%)

74 (1.2%)

Triangle

5,572

44,919 (avg. 8.1)

5,120 (91.9%)

118 (2.1%)

Rational Numbers

1,209

6,371 (avg. 5.3)

848 (70.1%)

25 (2.1%)

Complex Numbers

749

3,445 (avg. 4.6)

630 (84.1%)

9 (1.2%)

Raindrops

2,631

6,496 (avg. 2.5)

2,469 (93.8%)

155 (5.9%)

Bottle Song

575

5,295 (avg. 9.2)

427 (74.3%)

4 (0.7%)

Proverb

2,480

15,837 (avg. 6.4)

2,237 (90.2%)

29 (1.2%)

Strain

1,733

3,966 (avg. 2.3)

1,400 (80.8%)

29 (1.7%)

House

755

3,165 (avg. 4.2)

601 (79.6%)

9 (1.2%)

Protein Translation

3,186

28,432 (avg. 8.9)

2,697 (84.7%)

61 (1.9%)

Roman Numerals

3,420

24,540 (avg. 7.2)

2,757 (80.6%)

82 (2.4%)

Simple Cipher

1,013

5,942 (avg. 5.9)

756 (74.6%)

25 (2.5%)

ETL

2,309

6,367 (avg. 2.8)

2,092 (90.6%)

62 (2.7%)

Parallel Letter Frequency

978

4,331 (avg. 4.4)

732 (74.8%)

23 (2.4%)

Alphametics

357

319 (avg. 0.9)

146 (40.9%)

1 (0.3%)

Sieve

1,329

6,655 (avg. 5.0)

1,164 (87.6%)

24 (1.8%)

Anagram

3,617

33,672 (avg. 9.3)

2,879 (79.6%)

99 (2.7%)

Binary Search

2,955

23,189 (avg. 7.8)

2,467 (83.5%)

70 (2.4%)

Kindergarten Garden

1,447

6,792 (avg. 4.7)

1,239 (85.6%)

80 (5.5%)

Secret Handshake

1,463

10,181 (avg. 7.0)

1,187 (81.1%)

30 (2.1%)

Matrix

901

4,834 (avg. 5.4)

741 (82.2%)

11 (1.2%)

Crypto Square

1,420

14,166 (avg. 10.0)

714 (50.3%)

28 (2.0%)

Flower Field

167

567 (avg. 3.4)

128 (76.6%)

0 (0.0%)

Food Chain

608

3,846 (avg. 6.3)

498 (81.9%)

5 (0.8%)

Tree Building

598

2,057 (avg. 3.4)

430 (71.9%)

6 (1.0%)

Change

608

5,268 (avg. 8.7)

359 (59.0%)

14 (2.3%)

Rectangles

776

4,789 (avg. 6.2)

449 (57.9%)

8 (1.0%)

Wordy

535

4,152 (avg. 7.8)

385 (72.0%)

17 (3.2%)

Connect

355

1,809 (avg. 5.1)

234 (65.9%)

7 (2.0%)

SGF Parsing

316

1,460 (avg. 4.6)

200 (63.3%)

1 (0.3%)

Atbash Cipher

708

5,545 (avg. 7.8)

626 (88.4%)

18 (2.5%)

Binary Search Tree

668

3,008 (avg. 4.5)

475 (71.1%)

8 (1.2%)

Flatten Array

1,066

6,800 (avg. 6.4)

779 (73.1%)

16 (1.5%)

List Ops

650

3,655 (avg. 5.6)

529 (81.4%)

16 (2.5%)

Sublist

675

4,209 (avg. 6.2)

507 (75.1%)

8 (1.2%)

Ledger

418

2,242 (avg. 5.4)

297 (71.1%)

6 (1.4%)

OCR Numbers

432

2,661 (avg. 6.2)

341 (78.9%)

5 (1.2%)

Saddle Points

2,132

16,511 (avg. 7.7)

1,408 (66.0%)

71 (3.3%)

Palindrome Products

358

423 (avg. 1.2)

267 (74.6%)

13 (3.6%)

Save the Cow

239 (avg. 3.9)

25 (41.0%)

0 (0.0%)

Two Bucket

352

1,391 (avg. 4.0)

214 (60.8%)

2 (0.6%)

Go Counting

375

1,910 (avg. 5.1)

241 (64.3%)

2 (0.5%)

D&D Character

1,144

9,073 (avg. 7.9)

936 (81.8%)

20 (1.7%)

Queen Attack

1,199

5,072 (avg. 4.2)

1,064 (88.7%)

14 (1.2%)

Robot Simulator

1,183

5,578 (avg. 4.7)

993 (83.9%)

19 (1.6%)

Bank Account

1,037

3,275 (avg. 3.2)

793 (76.5%)

20 (1.9%)

Simple Linked List

783

5,455 (avg. 7.0)

529 (67.6%)

10 (1.3%)

Error Handling

1,186

4,684 (avg. 3.9)

979 (82.5%)

20 (1.7%)

Affine Cipher

405

3,074 (avg. 7.6)

300 (74.1%)

3 (0.7%)

ISBN Verifier

801

5,514 (avg. 6.9)

672 (83.9%)

13 (1.6%)

Prism

111

1,011 (avg. 9.1)

72 (64.9%)

0 (0.0%)

Twelve Days

558

1,530 (avg. 2.7)

472 (84.6%)

6 (1.1%)

Word Count

980

4,369 (avg. 4.5)

824 (84.1%)

31 (3.2%)

Yacht

511

3,435 (avg. 6.7)

417 (81.6%)

9 (1.8%)

DOT DSL

359

1,894 (avg. 5.3)

254 (70.8%)

2 (0.6%)

Linked List

948

4,497 (avg. 4.7)

658 (69.4%)

14 (1.5%)

Diamond

421

1,878 (avg. 4.5)

314 (74.6%)

8 (1.9%)

Grep

470

3,174 (avg. 6.8)

347 (73.8%)

4 (0.9%)

Luhn

815

7,700 (avg. 9.4)

700 (85.9%)

7 (0.9%)

Markdown

696

2,895 (avg. 4.2)

480 (69.0%)

26 (3.7%)

State of Tic-Tac-Toe

161

951 (avg. 5.9)

124 (77.0%)

1 (0.6%)

Word Search

912

10,566 (avg. 11.6)

512 (56.1%)

13 (1.4%)

Bowling

673

8,968 (avg. 13.3)

384 (57.1%)

11 (1.6%)

REST API

653

6,360 (avg. 9.7)

268 (41.0%)

13 (2.0%)

Poker

436

3,047 (avg. 7.0)

238 (54.6%)

2 (0.5%)

Run-Length Encoding

2,003

30,745 (avg. 15.3)

1,641 (81.9%)

55 (2.7%)

Pig Latin

1,374

15,811 (avg. 11.5)

785 (57.1%)

35 (2.5%)

Transpose

765

9,893 (avg. 12.9)

474 (62.0%)

3 (0.4%)

Say

512

4,158 (avg. 8.1)

392 (76.6%)

8 (1.6%)

Book Store

1,160

9,511 (avg. 8.2)

592 (51.0%)

29 (2.5%)

Custom Set

377

2,340 (avg. 6.2)

291 (77.2%)

1 (0.3%)

Nth Prime

410

1,582 (avg. 3.9)

334 (81.5%)

4 (1.0%)

Rail Fence Cipher

1,050

10,987 (avg. 10.5)

609 (58.0%)

15 (1.4%)

Diffie-Hellman

2,040

11,474 (avg. 5.6)

1,304 (63.9%)

22 (1.1%)

Zebra Puzzle

475

1,326 (avg. 2.8)

237 (49.9%)

3 (0.6%)

React

481

2,594 (avg. 5.4)

218 (45.3%)

4 (0.8%)

POV

262

1,522 (avg. 5.8)

172 (65.6%)

1 (0.4%)

Zipper

277

1,157 (avg. 4.2)

179 (64.6%)

1 (0.4%)

Reverse String

6,996

23,628 (avg. 3.4)

6,359 (90.9%)

168 (2.4%)

RNA Transcription

2,609

5,711 (avg. 2.2)

2,281 (87.4%)

95 (3.6%)

Conway's Game of Life

563

2,885 (avg. 5.1)

306 (54.4%)

7 (1.2%)

Eliud's Eggs

980

4,630 (avg. 4.7)

781 (79.7%)

4 (0.4%)

Knapsack

467

2,855 (avg. 6.1)

275 (58.9%)

4 (0.9%)

Square Root

1,108

4,155 (avg. 3.8)

972 (87.7%)

8 (0.7%)

Killer Sudoku Helper

173

517 (avg. 3.0)

113 (65.3%)

1 (0.6%)

Satellite

142

671 (avg. 4.7)

114 (80.3%)

2 (1.4%)

Intergalactic Transmission

100

540 (avg. 5.4)

81 (81.0%)

0 (0.0%)

Relative Distance

143

617 (avg. 4.3)

93 (65.0%)

0 (0.0%)

Split-Second Stopwatch

271

2,340 (avg. 8.6)

157 (57.9%)

0 (0.0%)

Baffling Birthdays

196

1,358 (avg. 6.9)

158 (80.6%)

0 (0.0%)

Swift Scheduling

163

773 (avg. 4.7)

104 (63.8%)

4 (2.5%)

Camicia

784

2,277 (avg. 2.9)

79 (10.1%)

6 (0.8%)

8 deprecated practice exercises

Started

Attempts

Completions

Mentoring requests

Beer Song

1,942

26,943 (avg. 13.9)

1,520 (78.3%)

33 (1.7%)

Binary

106 (avg. 1.3)

79 (98.8%)

6 (7.5%)

Hangman

408

1,117 (avg. 2.7)

188 (46.1%)

2 (0.5%)

Hexadecimal

23 (avg. 1.0)

21 (95.5%)

0 (0.0%)

Minesweeper

480

2,140 (avg. 4.5)

366 (76.3%)

7 (1.5%)

Octal

50 (avg. 1.2)

42 (97.7%)

2 (4.7%)

Scale Generator

545

3,888 (avg. 7.1)

346 (63.5%)

4 (0.7%)

Trinary

67 (avg. 1.3)

51 (98.1%)

3 (5.8%)

2 unimplemented practice exercises

Piecing It Together

View data

Resistor Color Tolerance

View data

6 foregone practice exercises

Counter

Lens Person

Micro Blog

Nucleotide Codons

PaaS I/O

Point Mutations

Test Runner

Learn More

Create Test Runners that have the single responsibility of taking a solution, running all tests and returning a standardized output.

Current version: 6acde4153c1eb1486cac88c68a3ded1e075c99d1 (Takes up to 10 mins to deploy)

Total Test Runner Runs

5,962,846

Test Run Pass Rate

15.4% (915302)

Test Run Fail Rate

38.3% (2286588)

Test Run Error Rate

46.3% (2760956)

Representer

Learn More

Build a Representer: a bit of code that has the single responsibility of taking a solution and returning a normalized representation of it.

Current version: c7d04a008a2a1f3c2f967ed867790adbab9ad84e (Takes up to 10 mins to deploy)

Total Representer Runs

845,564

Total Representation Comments Made

105,665

Feedback Given Frequency

12.5%

Analyzer

Learn More

Build an Analyzer for C#: Exercism's analyzers automatically assess student's submissions and provide mentor-style commentary.

Current version: f8a08540f0c1cadfe1485b83b23dacfe140c6aef (Takes up to 10 mins to deploy)

Total Analyzer Runs

836,747

Total Analysis Comments Made

375,488

Feedback Given Frequency

5.3%

975 Volunteers

975

ErikSchierboom

mikedamay

valentin-p

+ 959 more

We 💙 our volunteers

Exercism relies on open-source volunteers to build our language tracks and mentor students.

Become an Exercism Volunteer

Language Tracks

Learn To Code with Jiki

Your Journey

Your FavoritesNew

Exercism Perks

Community Videos

Brief Introduction Series

Interviews & Stories

Discord

Forum

Getting started

Mentoring

Docs

Contributors

TranslatorsNew

Donate

About Exercism

Our Impact

GitHub SyncerNew

Insiders

C# Track Management

The C# track is exemplar ✨

C# syllabus

Practice Exercises

Test Runner

Representer

Analyzer

We 💙 our volunteers