A comprehensive guide to C# multiline string techniques covering three approaches: verbatim strings (@"...") available since C# 2.0, raw string literals ("""...""") introduced in C# 11 that solve indentation issues and eliminate escaping, and UTF-8 string literals ("..."u8) from .NET 7 that produce compile-time ReadOnlySpan<byte> with zero runtime overhead. Includes comparison table, real-world examples for JSON test fixtures and HTTP headers, and guidance on when to use each approach.
Table of contents
Why Multiline Strings MatterVerbatim String Literals (@"...")Raw String Literals (C# 11 / .NET 6+)UTF-8 String Literals (.NET 7+)Comparison: Which String Literal to Use?Real-World Example: Embedding a JSON Test FixtureReal-World Example: UTF-8 HTTP Response HeadersMulti-line Strings and TestingKey TakeawaysFAQ1 Comment
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