C# String Interpolation
C# string interpolation is a language feature introduced in C# 6.0 that allows developers to embed expressions directly within string literals using a concise syntax with the '$' prefix. It simplifies string formatting by replacing placeholders with evaluated expressions, making code more readable and maintainable compared to traditional methods like string.Format(). This feature automatically converts expressions to strings and supports formatting options for numbers, dates, and other types.
Developers should use C# string interpolation when building dynamic strings in applications, such as generating log messages, constructing SQL queries, or creating user-friendly output in console or web apps. It is particularly useful in scenarios requiring frequent string concatenation or formatting, as it reduces boilerplate code and minimizes errors from mismatched placeholders. For example, in ASP.NET Core for building HTML templates or in data processing pipelines for generating formatted reports.