Case Converter for .NET

“Naming Conventions is one of the two hard things in Computer Science” --- Jeff Atwood (Stack Overflow Co-founder).

This library is designed to make it easier to convert the different case conventions in c# / .net through some simple to use string extension methods.

Simple string extension library designed to make it easy to convert strings between different cases such as camelCase, snake_case, kebab-case, PascalCase, Train-Case and Title Case.

This is a .NET STANDARD 2.0 and .NET STANDARD 2.1 Library

Installation

NuGet:

Install-Package CaseConverter

dotnet CLI

dotnet add package CaseConverter

Usage

	
    using CaseConverter;

    Console.WriteLine("Hello World!".ToCamelCase());
    Console.WriteLine("Hello World!".ToSnakeCase());
    Console.WriteLine("Hello World!".ToKebabCase());
    Console.WriteLine("Hello World!".ToPascalCase());
    Console.WriteLine("Hello World!".ToTitleCase());
    Console.WriteLine("Hello World!".ToTrainCase());
    

String extensions:

• string.ToSnakeCase() Converts any string to snake_case.
• string.ToCamelCase() Converts any string to camelCase optionally removing whitespace.
• string.ToKebabCase() Converts any string to kebab-case.
• string.ToPascalCase() Converts any string to PascalCase.
• string.ToTrainCase() Converts any string to Train-Case.
• string.ToTitleCase() Converts any string to Title Case. Wrapper for TextInfo.ToTitleCase()

Supplementary string extensions included:

• string.PascalCaseSingleWord() Convert a single word to Pascal Case.
• string.InsertCharacterBeforeUpperCase() Insert any character before all upper space characters in a string.
• string.InsertSpaceBeforeUpperCase() Insert a space before all upper space characters in a string.
• string.SplitCamelCase() Split a string by Uppercase whilst dealing correctly with acronyms.
• string.Replace() Replace specific characters found in a string.
• string.ReplaceWhitespace() C Replace all whitespace in a string.
• string.InsertCharacterBeforeUpperCase() Converts a string to Title Case.
• string.IsAllUpper() Test to determine if a string is all upper case.
• string.SnakeCaseToCamelCase() Convert SnakeCase to CamelCase.
• string.FirstCharToLowerCase() Convert the first character in a string to lower case.
• string.FirstCharToUpperCase() Convert the first character in a string to upper case.

Tests

We added a lot more tests in the latest version.

To run tests:

dotnet test

Benchmarks

For the latest version we're working on improving performance and memory efficiency.. here is a comparison of the improvements.

Additional gains will likely be possible if also target .net 6+. So far we've only done that with ToTitleCase() but we'll update the other methods soon.

ToPascalCase()

Method	Mean	Error	StdDev	Gen0	Allocated
ToPascalCaseBenchmark	179.9 ns	3.00 ns	2.34 ns	0.0315	264 B
ToPascalCaseBenchmarkOld	2,269.5 ns	43.25 ns	36.12 ns	0.4005	3352 B

ToKebabCase()

Method	Mean	Error	StdDev	Gen0	Allocated
ToKebabCaseBenchmark	132.1 ns	2.69 ns	4.02 ns	0.0324	272 B
ToKebabCaseBenchmarkOld	1,423.1 ns	27.69 ns	27.19 ns	0.0496	424 B

ToTitleCase()

Method	Mean	Error	StdDev	Gen0	Allocated
ToTitleCaseBenchmark	218.3 ns	2.59 ns	2.43 ns	0.0200	168 B
ToTitleCaseBenchmarkOld	225.8 ns	3.26 ns	3.05 ns	0.0381	320 B

ToCamelCase()

Method	Mean	Error	StdDev	Gen0	Allocated
ToCamelCaseBenchmark	1.497 us	0.0206 us	0.0193 us	0.1659	1.36 KB
ToCamelCaseOldBenchmark	5.362 us	0.0730 us	0.0609 us	0.4272	3.52 KB

ToSnakeCase()

Wasn't able to improve it so left the original code intact.

Method	Mean	Error	StdDev	Gen0	Allocated
ToSnakeCaseBenchmark	1.765 us	0.0112 us	0.0094 us	0.1793	1.47 KB

All Tests

Method	Job	Runtime	Mean	Error	StdDev	Ratio	RatioSD	Gen0	Allocated	Alloc Ratio
ToSnakeCaseBenchmark	.NET 5.0	.NET 5.0	199.257 ns	3.8065 ns	3.9090 ns	0.95	0.02	0.0343	288 B	1.00
ToSnakeCaseBenchmark	.NET 6.0	.NET 6.0	177.983 ns	3.4400 ns	3.6807 ns	0.84	0.02	0.0343	288 B	1.00
ToSnakeCaseBenchmark	.NET 7.0	.NET 7.0	164.851 ns	1.4823 ns	1.3140 ns	0.78	0.01	0.0343	288 B	1.00
ToSnakeCaseBenchmark	.NET Core 3.1	.NET Core 3.1	211.328 ns	2.4708 ns	2.0633 ns	1.00	0.00	0.0343	288 B	1.00
ToCamelCaseBenchmark	.NET 5.0	.NET 5.0	115.336 ns	2.3167 ns	2.2753 ns	0.77	0.05	0.0200	168 B	1.00
ToCamelCaseBenchmark	.NET 6.0	.NET 6.0	82.941 ns	1.4910 ns	1.3946 ns	0.56	0.03	0.0200	168 B	1.00
ToCamelCaseBenchmark	.NET 7.0	.NET 7.0	86.708 ns	1.3273 ns	1.0363 ns	0.58	0.03	0.0200	168 B	1.00
ToCamelCaseBenchmark	.NET Core 3.1	.NET Core 3.1	156.865 ns	3.6809 ns	10.8532 ns	1.00	0.00	0.0200	168 B	1.00
ToKebabCaseBenchmark	.NET 5.0	.NET 5.0	188.836 ns	2.3753 ns	2.1056 ns	0.89	0.03	0.0324	272 B	1.00
ToKebabCaseBenchmark	.NET 6.0	.NET 6.0	129.301 ns	1.7678 ns	1.5671 ns	0.61	0.02	0.0324	272 B	1.00
ToKebabCaseBenchmark	.NET 7.0	.NET 7.0	127.751 ns	2.3711 ns	2.2179 ns	0.60	0.02	0.0324	272 B	1.00
ToKebabCaseBenchmark	.NET Core 3.1	.NET Core 3.1	210.257 ns	4.2073 ns	6.0339 ns	1.00	0.00	0.0324	272 B	1.00
ToPascalCaseBenchmark	.NET 5.0	.NET 5.0	278.123 ns	3.2519 ns	3.0418 ns	0.85	0.02	0.0315	264 B	1.00
ToPascalCaseBenchmark	.NET 6.0	.NET 6.0	189.604 ns	2.2500 ns	1.9945 ns	0.58	0.02	0.0315	264 B	1.00
ToPascalCaseBenchmark	.NET 7.0	.NET 7.0	170.063 ns	2.5240 ns	2.1076 ns	0.52	0.01	0.0315	264 B	1.00
ToPascalCaseBenchmark	.NET Core 3.1	.NET Core 3.1	324.897 ns	6.4022 ns	8.0968 ns	1.00	0.00	0.0315	264 B	1.00
ToTitleCaseBenchmark	.NET 5.0	.NET 5.0	281.820 ns	5.5559 ns	4.6395 ns	0.90	0.02	0.0200	168 B	1.00
ToTitleCaseBenchmark	.NET 6.0	.NET 6.0	506.287 ns	8.0127 ns	8.9061 ns	1.62	0.05	0.1211	1016 B	6.05
ToTitleCaseBenchmark	.NET 7.0	.NET 7.0	485.576 ns	8.4432 ns	8.6705 ns	1.54	0.04	0.1211	1016 B	6.05
ToTitleCaseBenchmark	.NET Core 3.1	.NET Core 3.1	314.564 ns	4.8291 ns	4.0325 ns	1.00	0.00	0.0200	168 B	1.00
ToTrainCaseBenchmark	.NET 5.0	.NET 5.0	488.572 ns	9.3516 ns	8.7475 ns	0.90	0.02	0.0639	536 B	1.00
ToTrainCaseBenchmark	.NET 6.0	.NET 6.0	343.272 ns	4.4961 ns	4.2056 ns	0.63	0.02	0.0639	536 B	1.00
ToTrainCaseBenchmark	.NET 7.0	.NET 7.0	302.115 ns	5.8996 ns	6.5574 ns	0.56	0.02	0.0639	536 B	1.00
ToTrainCaseBenchmark	.NET Core 3.1	.NET Core 3.1	542.426 ns	10.8240 ns	10.6306 ns	1.00	0.00	0.0639	536 B	1.00
IsAllUpperBenchmark	.NET 5.0	.NET 5.0	6.971 ns	0.1332 ns	0.1480 ns	0.74	0.02	-	-	NA
IsAllUpperBenchmark	.NET 6.0	.NET 6.0	5.091 ns	0.1288 ns	0.1533 ns	0.54	0.02	-	-	NA
IsAllUpperBenchmark	.NET 7.0	.NET 7.0	4.166 ns	0.0988 ns	0.1057 ns	0.44	0.01	-	-	NA
IsAllUpperBenchmark	.NET Core 3.1	.NET Core 3.1	9.476 ns	0.0494 ns	0.0385 ns	1.00	0.00	-	-	NA
ReplaceWhitespaceBenchmark	.NET 5.0	.NET 5.0	7,583.997 ns	132.7825 ns	124.2049 ns	0.40	0.01	0.0839	728 B	0.06
ReplaceWhitespaceBenchmark	.NET 6.0	.NET 6.0	7,196.590 ns	125.6170 ns	117.5022 ns	0.38	0.01	0.0839	728 B	0.06
ReplaceWhitespaceBenchmark	.NET 7.0	.NET 7.0	7,353.717 ns	144.7446 ns	148.6420 ns	0.39	0.02	0.0839	728 B	0.06
ReplaceWhitespaceBenchmark	.NET Core 3.1	.NET Core 3.1	18,699.030 ns	362.7740 ns	542.9830 ns	1.00	0.00	1.4343	12168 B	1.00

If you can suggest further improvements please get in touch or better still make the improvements and send us a PR :-)

Contributing

1. Fork it!
2. Create your feature branch: git checkout -b my-new-feature
3. Commit your changes: git commit -am 'Add some feature'
4. Push to the branch: git push origin my-new-feature
5. Submit a pull request :D

License

The MIT License (MIT) See LICENCE file for Licence (MIT Licence)

© 2021-2023 Captive Reality Ltd. All Rights Reserved. Author: Mark Castle