IronRuby
IronRuby is an open-source implementation of the Ruby programming language that runs on the .NET Framework and .NET Core. It integrates Ruby with the .NET ecosystem, allowing developers to write Ruby code that can interact with .NET libraries and frameworks. This enables Ruby developers to leverage .NET capabilities while maintaining Ruby's syntax and dynamic features.
Developers should learn IronRuby when they need to use Ruby within a .NET environment, such as for scripting in .NET applications, building web apps with ASP.NET using Ruby, or integrating Ruby code with existing .NET systems. It is particularly useful in mixed-language projects where Ruby's productivity benefits are desired alongside .NET's performance and library support, though its adoption has declined with the rise of other .NET languages like C# and F#.