What′s new in C# 15: Overview (pvs-studio.com)

submitted 1 week ago by CodiUnicorn@programming.dev to c/dotnet@programming.dev

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[-] JakenVeina@midwest.social 2 points 1 week ago

You mean like the "single bracketed expression" syntax we've had since... hell, I don't even know, C#4?

List<string> items =
[
    new(capacity: 10),
    "First",
    "Second",
    "Third"
];

var items = new List<string>(capacity: 10)
{
    "First",
    "Second",
    "Third"
};

[-] RaphaelSchmitz@feddit.org 3 points 1 week ago

I think it's las about verbosity and more about maintainability. I like to use collection expressions as direct arguments because they automatically get typed based on the parameter type. Something like

ProcessEmployees([ employee, manager ]);

Now if you adjust the parameter type from List<> to HashSet<> you don't need to change anything at the call site.

That was the situation before. With that new feature I can now configure the collection more where needed.

this post was submitted on 21 Oct 2026

14 points (100.0% liked)

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