Some random C# extension methods I've found useful. Published as Ardalis.Extensions on Nuget.

• Installation
• Usage
  • String checks
• Conventions for Contributors
• Benchmarks
• Roadmap

Just add a reference the the package and then anywhere you want to use the extensions, add the appropriate using statement.

dotnet add package Ardalis.Extensions

IsNull() checks whether a given string is null.

// replace
if(someString is null)

// with
if(someString.IsNull())

IsNullOrEmpty() checks whether a given string is null or empty.

// replace
if(String.IsNullOrEmpty(someString))

// with
if(someString.IsNullOrEmpty())

IsNullOrWhiteSpace checks whether a given string is null or empty or consists of only whitespace characters.

// replace
if(String.IsNullOrWhiteSpace(someString))

// with
if(someString.IsNullOrWhiteSpace())

• Extension methods are grouped into folders based on similar purpose.
• Folder nesting should match class namespaces.
  • Ardalis.Extensions.Parsing
  • Ardalis.Extensions.Encoding.Base64
• One extension method class per folder.
• Extension methods classes should have an Extensions suffix.
• Classes should be made partial.
• One extension method per file.
• Overloads should be placed in the same file.
• File names should be the contained extension method's name.
• Tests should be provided for each extension method and overload.
• Test classes should have a Tests suffix.
• Benchmark classe should have a Benchmarks suffix.

To run all of the benchmarks, run the following command from the benchmarks project folder:

dotnet run -c Release

For now as I gather different useful extensions there is a single Ardalis.Extensions package available on NuGet. Once there are more than a few, I will most likely break up the extensions into separate individual NuGet packages (for example: Ardalis.StringExtensions? Ardalis.Extensions.Strings?) and then the original Ardalis.Extensions would become a meta-package that would pull in all of the separate smaller packages.