In this post I introduce C#12 collection expressions, discuss the benefits of the unified syntax for refactoring, and show how to use the spread element

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This post introduces collection expressions in C#12. It explains the code generated when using collection expressions and how they work compared to collection initializers. The post highlights the benefits of collection expressions, such as a unified syntax for different collection types, performance improvements, and additional features. It also mentions the use of spread elements to build collections from existing collections.

Introducing collection expressions in C#12

Unifying syntax with collection expressions

Inferring interface types with collection expressions

Efficient automatic stackalloc for ReadOnlySpan

Collection expressions make refactoring simpler

Building collections from others with the spread element