C# impact and status on Exercism

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C# Track Management

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

Students

187,216

Submissions

6,068,089

Mentoring Discussions

22,639

The C# track is exemplar ✨

Building

C# syllabus

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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

16,363 learnt

For Loops

16,363 learnt

Foreach Loops

16,363 learnt

Basics

48,921 learnt

Booleans

35,076 learnt

Casting

6,000 learnt

Chars

8,564 learnt

String Builder

8,564 learnt

Classes

15,267 learnt

Constants

2,732 learnt

Defensive Copying

2,732 learnt

Readonly Collections

2,732 learnt

Constructors

9,951 learnt

Datetimes

8,745 learnt

Dictionaries

5,964 learnt

Enums

5,058 learnt

Equality

2,834 learnt

Sets

2,834 learnt

Exceptions

4,597 learnt

Conditionals Ternary

3,063 learnt

Expression Bodied Members

3,063 learnt

Switch Expressions

3,063 learnt

Throw Expressions

3,063 learnt

Attributes

2,891 learnt

Flag Enums

2,891 learnt

Do While Loops

13,271 learnt

Floating Point Numbers

13,271 learnt

While Loops

13,271 learnt

Inheritance

7,123 learnt

Integral Numbers

3,800 learnt

Interfaces

2,983 learnt

Ordering

2,983 learnt

Generic Types

6,928 learnt

Lists

6,928 learnt

Method Overloading

2,672 learnt

Named Arguments

2,672 learnt

Optional Parameters

2,672 learnt

Namespaces

1,646 learnt

Nested Types

1,655 learnt

Nullability

10,221 learnt

If Statements

21,513 learnt

Numbers

21,513 learnt

Object Initializers

2,393 learnt

Operator Overloading

1,932 learnt

Overflow

2,437 learnt

Parameters

1,982 learnt

Properties

3,278 learnt

Randomness

10,724 learnt

Regular Expressions

1,522 learnt

Resource Cleanup

2,279 learnt

Resource Lifetime

1,827 learnt

String Formatting

1,935 learnt

Verbatim Strings

1,935 learnt

Strings

23,642 learnt

Structs

1,671 learnt

Switch Statements

4,686 learnt

Time

2,399 learnt

Timezone

2,399 learnt

Tuples

12,486 learnt

Exception Filtering

1,548 learnt

User Defined Exceptions

1,548 learnt

Extension Methods

12,507 learnt

42 active learning exercises

Started

Attempts

Completions

Mentoring requests

Bird Watcher

25,131

265,282 (avg. 10.6)

16,363 (65.1%)

231 (0.9%)

Lucian's Luscious Lasagna

71,820

398,343 (avg. 5.5)

48,921 (68.1%)

447 (0.6%)

Annalyn's Infiltration

42,843

387,760 (avg. 9.1)

35,076 (81.9%)

403 (0.9%)

Secure Munchester United

7,055

49,990 (avg. 7.1)

6,000 (85.0%)

48 (0.7%)

Squeaky Clean

11,451

225,097 (avg. 19.7)

8,564 (74.8%)

159 (1.4%)

Jedlik's Toys

16,664

169,016 (avg. 10.1)

15,267 (91.6%)

126 (0.8%)

Authentication System

3,577

37,424 (avg. 10.5)

2,732 (76.4%)

23 (0.6%)

Need for Speed

11,207

170,411 (avg. 15.2)

9,951 (88.8%)

104 (0.9%)

Booking up for Beauty

9,743

109,636 (avg. 11.3)

8,745 (89.8%)

58 (0.6%)

International Calling Connoisseur

6,406

81,560 (avg. 12.7)

5,964 (93.1%)

46 (0.7%)

Logs, Logs, Logs!

5,404

45,375 (avg. 8.4)

5,058 (93.6%)

27 (0.5%)

Face ID 2.0

3,362

40,520 (avg. 12.1)

2,834 (84.3%)

34 (1.0%)

Calculator Conundrum

4,883

39,630 (avg. 8.1)

4,597 (94.1%)

39 (0.8%)

The Weather in Deather

3,382

21,413 (avg. 6.3)

3,063 (90.6%)

37 (1.1%)

Attack of the Trolls

3,211

32,360 (avg. 10.1)

2,891 (90.0%)

19 (0.6%)

Interest is Interesting

14,873

191,921 (avg. 12.9)

13,271 (89.2%)

109 (0.7%)

Wizards and Warriors

7,798

65,866 (avg. 8.4)

7,123 (91.3%)

62 (0.8%)

Hyper-optimized Telemetry

5,968

80,460 (avg. 13.5)

3,800 (63.7%)

65 (1.1%)

Remote Control Competition

3,306

32,651 (avg. 9.9)

2,983 (90.2%)

25 (0.8%)

Tracks on Tracks on Tracks

7,414

112,792 (avg. 15.2)

6,928 (93.4%)

59 (0.8%)

Wizards and Warriors 2.0

2,835

20,062 (avg. 7.1)

2,672 (94.3%)

18 (0.6%)

Red vs. Blue: Darwin Style

1,811

9,119 (avg. 5.0)

1,646 (90.9%)

4 (0.2%)

Remote Control Cleanup

1,946

19,733 (avg. 10.1)

1,655 (85.0%)

20 (1.0%)

Tim from Marketing

10,802

83,232 (avg. 7.7)

10,221 (94.6%)

90 (0.8%)

Cars, Assemble!

23,756

228,700 (avg. 9.6)

21,513 (90.6%)

188 (0.8%)

Developer Privileges

2,605

17,722 (avg. 6.8)

2,393 (91.9%)

15 (0.6%)

Hyperia Forex

2,103

18,325 (avg. 8.7)

1,932 (91.9%)

20 (1.0%)

Hyperinflation Hits Hyperia

2,565

17,162 (avg. 6.7)

2,437 (95.0%)

13 (0.5%)

Building Telemetry

2,150

18,118 (avg. 8.4)

1,982 (92.2%)

10 (0.5%)

Weighing Machine

3,547

52,624 (avg. 14.8)

3,278 (92.4%)

23 (0.6%)

Roll the Die!

11,273

55,565 (avg. 4.9)

10,724 (95.1%)

65 (0.6%)

Parsing Log Files

1,736

26,214 (avg. 15.1)

1,522 (87.7%)

12 (0.7%)

Object Relational Mapping

2,638

25,056 (avg. 9.5)

2,279 (86.4%)

15 (0.6%)

Orm in One Go

1,965

11,185 (avg. 5.7)

1,827 (93.0%)

15 (0.8%)

High School Sweethearts

2,103

32,858 (avg. 15.6)

1,935 (92.0%)

8 (0.4%)

Log Levels

31,070

372,336 (avg. 12.0)

23,642 (76.1%)

364 (1.2%)

Land Grab in Space

1,840

16,736 (avg. 9.1)

1,671 (90.8%)

20 (1.1%)

Football Match Reports

5,032

93,195 (avg. 18.5)

4,686 (93.1%)

44 (0.9%)

Beauty Salon Goes Global

2,952

46,915 (avg. 15.9)

2,399 (81.3%)

29 (1.0%)

Phone Number Analysis

13,779

95,930 (avg. 7.0)

12,486 (90.6%)

106 (0.8%)

Instruments of Texas

1,721

14,167 (avg. 8.2)

1,548 (89.9%)

18 (1.0%)

Log Analysis

15,570

213,099 (avg. 13.7)

12,507 (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

155,296

426,395 (avg. 2.7)

101,991 (65.7%)

32 (0.0%)

Two Fer

9,271

17,498 (avg. 1.9)

7,317 (78.9%)

2,597 (28.0%)

Leap

19,611

79,704 (avg. 4.1)

17,732 (90.4%)

2,454 (12.5%)

Line Up

1,694

10,251 (avg. 6.1)

1,505 (88.8%)

30 (1.8%)

Gigasecond

7,902

15,051 (avg. 1.9)

6,939 (87.8%)

834 (10.6%)

Resistor Color

7,771

29,898 (avg. 3.8)

6,820 (87.8%)

1,641 (21.1%)

Space Age

7,457

33,783 (avg. 4.5)

6,537 (87.7%)

1,275 (17.1%)

High Scores

4,122

15,001 (avg. 3.6)

3,458 (83.9%)

974 (23.6%)

Hamming

5,146

13,339 (avg. 2.6)

4,611 (89.6%)

934 (18.2%)

Nucleotide Count

4,218

11,971 (avg. 2.8)

3,846 (91.2%)

865 (20.5%)

Robot Name

5,318

44,499 (avg. 8.4)

3,934 (74.0%)

738 (13.9%)

Allergies

3,428

16,106 (avg. 4.7)

2,634 (76.8%)

459 (13.4%)

Grade School

3,157

14,912 (avg. 4.7)

2,641 (83.7%)

406 (12.9%)

Rotational Cipher

4,214

31,904 (avg. 7.6)

3,484 (82.7%)

355 (8.4%)

Circular Buffer

2,194

14,211 (avg. 6.5)

1,645 (75.0%)

242 (11.0%)

Clock

2,158

16,204 (avg. 7.5)

1,673 (77.5%)

233 (10.8%)

Bob

11,020

172,752 (avg. 15.7)

8,804 (79.9%)

860 (7.8%)

Matching Brackets

1,824

12,653 (avg. 6.9)

1,479 (81.1%)

180 (9.9%)

Spiral Matrix

2,356

16,978 (avg. 7.2)

1,737 (73.7%)

134 (5.7%)

Tournament

1,259

10,483 (avg. 8.3)

883 (70.1%)

96 (7.6%)

Variable Length Quantity

850

5,012 (avg. 5.9)

536 (63.1%)

54 (6.4%)

Dominoes

4,302

37,123 (avg. 8.6)

1,487 (34.6%)

89 (2.1%)

Forth

623

6,164 (avg. 9.9)

333 (53.5%)

29 (4.7%)

Pangram

6,709

23,683 (avg. 3.5)

5,605 (83.5%)

324 (4.8%)

Isogram

4,686

19,969 (avg. 4.3)

4,215 (89.9%)

183 (3.9%)

Acronym

3,753

19,805 (avg. 5.3)

3,249 (86.6%)

185 (4.9%)

Grains

2,820

8,918 (avg. 3.2)

2,464 (87.4%)

106 (3.8%)

Perfect Numbers

2,437

8,683 (avg. 3.6)

2,182 (89.5%)

81 (3.3%)

Collatz Conjecture

3,115

10,177 (avg. 3.3)

2,883 (92.6%)

92 (3.0%)

Phone Number

2,428

14,626 (avg. 6.0)

2,035 (83.8%)

68 (2.8%)

Scrabble Score

4,683

25,590 (avg. 5.5)

4,057 (86.6%)

132 (2.8%)

Meetup

2,048

9,787 (avg. 4.8)

1,474 (72.0%)

44 (2.1%)

Difference of Squares

7,986

42,302 (avg. 5.3)

6,954 (87.1%)

169 (2.1%)

Resistor Color Duo

2,837

15,052 (avg. 5.3)

2,644 (93.2%)

41 (1.4%)

Resistor Color Trio

999

6,612 (avg. 6.6)

909 (91.0%)

7 (0.7%)

Series

2,249

8,846 (avg. 3.9)

1,963 (87.3%)

92 (4.1%)

Sum of Multiples

5,371

30,910 (avg. 5.8)

4,384 (81.6%)

305 (5.7%)

Accumulate

3,566

10,530 (avg. 3.0)

2,933 (82.2%)

135 (3.8%)

All Your Base

1,178

7,075 (avg. 6.0)

888 (75.4%)

22 (1.9%)

Largest Series Product

1,115

4,736 (avg. 4.2)

937 (84.0%)

18 (1.6%)

Pascal's Triangle

1,231

5,142 (avg. 4.2)

973 (79.0%)

22 (1.8%)

Prime Factors

1,242

4,324 (avg. 3.5)

1,092 (87.9%)

19 (1.5%)

Pythagorean Triplet

3,478

22,976 (avg. 6.6)

2,361 (67.9%)

64 (1.8%)

Armstrong Numbers

1,981

6,863 (avg. 3.5)

1,791 (90.4%)

46 (2.3%)

Darts

6,082

36,380 (avg. 6.0)

5,312 (87.3%)

74 (1.2%)

Triangle

5,581

44,989 (avg. 8.1)

5,130 (91.9%)

118 (2.1%)

Rational Numbers

1,210

6,375 (avg. 5.3)

849 (70.2%)

25 (2.1%)

Complex Numbers

750

3,450 (avg. 4.6)

631 (84.1%)

9 (1.2%)

Raindrops

2,633

6,499 (avg. 2.5)

2,470 (93.8%)

155 (5.9%)

Bottle Song

584

5,411 (avg. 9.3)

436 (74.7%)

4 (0.7%)

Proverb

2,490

15,896 (avg. 6.4)

2,246 (90.2%)

29 (1.2%)

Strain

1,735

3,969 (avg. 2.3)

1,402 (80.8%)

29 (1.7%)

House

756

3,171 (avg. 4.2)

602 (79.6%)

9 (1.2%)

Protein Translation

3,196

28,460 (avg. 8.9)

2,704 (84.6%)

61 (1.9%)

Roman Numerals

3,428

24,573 (avg. 7.2)

2,764 (80.6%)

83 (2.4%)

Simple Cipher

1,015

5,947 (avg. 5.9)

758 (74.7%)

25 (2.5%)

ETL

2,310

6,368 (avg. 2.8)

2,093 (90.6%)

62 (2.7%)

Parallel Letter Frequency

980

4,334 (avg. 4.4)

734 (74.9%)

23 (2.3%)

Alphametics

357

319 (avg. 0.9)

146 (40.9%)

1 (0.3%)

Sieve

1,333

6,689 (avg. 5.0)

1,167 (87.5%)

24 (1.8%)

Anagram

3,626

33,771 (avg. 9.3)

2,888 (79.6%)

99 (2.7%)

Binary Search

2,963

23,204 (avg. 7.8)

2,473 (83.5%)

70 (2.4%)

Kindergarten Garden

1,450

6,807 (avg. 4.7)

1,242 (85.7%)

80 (5.5%)

Secret Handshake

1,468

10,193 (avg. 6.9)

1,190 (81.1%)

30 (2.0%)

Matrix

902

4,835 (avg. 5.4)

742 (82.3%)

11 (1.2%)

Crypto Square

1,422

14,210 (avg. 10.0)

716 (50.4%)

28 (2.0%)

Flower Field

167

567 (avg. 3.4)

128 (76.6%)

0 (0.0%)

Food Chain

611

3,924 (avg. 6.4)

500 (81.8%)

6 (1.0%)

Tree Building

598

2,057 (avg. 3.4)

430 (71.9%)

6 (1.0%)

Change

610

5,280 (avg. 8.7)

360 (59.0%)

14 (2.3%)

Rectangles

779

4,799 (avg. 6.2)

451 (57.9%)

8 (1.0%)

Wordy

536

4,167 (avg. 7.8)

388 (72.4%)

17 (3.2%)

Connect

355

1,821 (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

710

5,555 (avg. 7.8)

627 (88.3%)

18 (2.5%)

Binary Search Tree

668

3,008 (avg. 4.5)

476 (71.3%)

8 (1.2%)

Flatten Array

1,068

6,802 (avg. 6.4)

781 (73.1%)

16 (1.5%)

List Ops

652

3,656 (avg. 5.6)

530 (81.3%)

16 (2.5%)

Sublist

677

4,212 (avg. 6.2)

509 (75.2%)

8 (1.2%)

Ledger

419

2,242 (avg. 5.4)

297 (70.9%)

6 (1.4%)

OCR Numbers

432

2,661 (avg. 6.2)

341 (78.9%)

5 (1.2%)

Saddle Points

2,138

16,535 (avg. 7.7)

1,411 (66.0%)

71 (3.3%)

Palindrome Products

358

423 (avg. 1.2)

267 (74.6%)

13 (3.6%)

Save the Cow

242 (avg. 3.7)

27 (41.5%)

0 (0.0%)

Two Bucket

353

1,489 (avg. 4.2)

215 (60.9%)

2 (0.6%)

Go Counting

376

1,910 (avg. 5.1)

241 (64.1%)

2 (0.5%)

D&D Character

1,147

9,086 (avg. 7.9)

939 (81.9%)

20 (1.7%)

Queen Attack

1,201

5,073 (avg. 4.2)

1,065 (88.7%)

14 (1.2%)

Robot Simulator

1,187

5,591 (avg. 4.7)

994 (83.7%)

19 (1.6%)

Bank Account

1,041

3,290 (avg. 3.2)

796 (76.5%)

20 (1.9%)

Simple Linked List

784

5,456 (avg. 7.0)

530 (67.6%)

10 (1.3%)

Error Handling

1,187

4,686 (avg. 3.9)

980 (82.6%)

20 (1.7%)

Affine Cipher

405

3,074 (avg. 7.6)

300 (74.1%)

3 (0.7%)

ISBN Verifier

802

5,516 (avg. 6.9)

674 (84.0%)

13 (1.6%)

Prism

117

1,134 (avg. 9.7)

79 (67.5%)

0 (0.0%)

Twelve Days

559

1,530 (avg. 2.7)

472 (84.4%)

6 (1.1%)

Word Count

981

4,370 (avg. 4.5)

824 (84.0%)

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

949

4,497 (avg. 4.7)

658 (69.3%)

14 (1.5%)

Diamond

423

1,894 (avg. 4.5)

315 (74.5%)

8 (1.9%)

Grep

471

3,229 (avg. 6.9)

348 (73.9%)

4 (0.8%)

Luhn

817

7,718 (avg. 9.4)

702 (85.9%)

7 (0.9%)

Markdown

698

2,922 (avg. 4.2)

482 (69.1%)

26 (3.7%)

State of Tic-Tac-Toe

162

980 (avg. 6.0)

125 (77.2%)

1 (0.6%)

Word Search

915

10,576 (avg. 11.6)

514 (56.2%)

13 (1.4%)

Bowling

674

9,016 (avg. 13.4)

386 (57.3%)

11 (1.6%)

REST API

655

6,428 (avg. 9.8)

269 (41.1%)

13 (2.0%)

Poker

438

3,116 (avg. 7.1)

240 (54.8%)

2 (0.5%)

Run-Length Encoding

2,010

30,863 (avg. 15.4)

1,647 (81.9%)

55 (2.7%)

Pig Latin

1,377

15,824 (avg. 11.5)

788 (57.2%)

35 (2.5%)

Transpose

765

9,898 (avg. 12.9)

475 (62.1%)

3 (0.4%)

Say

512

4,158 (avg. 8.1)

392 (76.6%)

8 (1.6%)

Book Store

1,166

9,532 (avg. 8.2)

596 (51.1%)

29 (2.5%)

Custom Set

378

2,357 (avg. 6.2)

292 (77.2%)

1 (0.3%)

Nth Prime

411

1,582 (avg. 3.8)

334 (81.3%)

4 (1.0%)

Rail Fence Cipher

1,052

11,015 (avg. 10.5)

610 (58.0%)

15 (1.4%)

Diffie-Hellman

2,046

11,494 (avg. 5.6)

1,309 (64.0%)

22 (1.1%)

Zebra Puzzle

475

1,326 (avg. 2.8)

237 (49.9%)

3 (0.6%)

React

482

2,594 (avg. 5.4)

218 (45.2%)

4 (0.8%)

POV

263

1,522 (avg. 5.8)

172 (65.4%)

1 (0.4%)

Zipper

277

1,157 (avg. 4.2)

179 (64.6%)

1 (0.4%)

Reverse String

7,013

23,697 (avg. 3.4)

6,372 (90.9%)

168 (2.4%)

RNA Transcription

2,609

5,711 (avg. 2.2)

2,282 (87.5%)

95 (3.6%)

Conway's Game of Life

568

2,898 (avg. 5.1)

310 (54.6%)

7 (1.2%)

Eliud's Eggs

986

4,636 (avg. 4.7)

786 (79.7%)

4 (0.4%)

Knapsack

469

2,856 (avg. 6.1)

275 (58.6%)

4 (0.9%)

Square Root

1,115

4,208 (avg. 3.8)

979 (87.8%)

8 (0.7%)

Killer Sudoku Helper

175

519 (avg. 3.0)

114 (65.1%)

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

661 (avg. 4.6)

93 (65.0%)

0 (0.0%)

Split-Second Stopwatch

273

2,372 (avg. 8.7)

159 (58.2%)

0 (0.0%)

Baffling Birthdays

200

1,360 (avg. 6.8)

158 (79.0%)

0 (0.0%)

Swift Scheduling

163

773 (avg. 4.7)

104 (63.8%)

4 (2.5%)

Camicia

808

2,302 (avg. 2.8)

83 (10.3%)

6 (0.7%)

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

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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

5,978,964

Test Run Pass Rate

15.4% (918348)

Test Run Fail Rate

38.3% (2292033)

Test Run Error Rate

46.3% (2768583)

Representer

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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

848,298

Total Representation Comments Made

106,035

Feedback Given Frequency

12.5%

Analyzer

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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

839,478

Total Analysis Comments Made

376,463

Feedback Given Frequency

5.3%

975 Volunteers

975

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