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C# 11 introduced list patterns, enabling pattern matching against arrays and lists using switch expressions. The tutorial covers empty match, exact match, relational/logical patterns within list patterns, discard patterns, var capture, and the slice pattern using dot-dot notation. It also explains how to make custom types compatible with list patterns by exposing Count/Length, an int indexer, and a range indexer or slice method. Nested list patterns for jagged arrays are demonstrated, and the compiler-generated code is briefly examined to show how patterns translate to if-statement chains and indexer calls.

List Patterns (C# 11)