.NET Generics

Allow for:

• generalization of logic based on available types
• specify possible supported types
• re-usability of code
• type safety
• defers the exact specification of logic until the class or method is declared and instantiated by user code with all type parameters specified
• mostly used for collections (some non-generic versions of collection are not recommended like ArrayList i.e.)
• information of exact type parameters used in a generic can be obtained at runtime by reflection

Further read:

https://learn.microsoft.com/en-us/dotnet/standard/generics/