C# 12 Collection Expressions

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C# 12 has introduced collection expressions.
I didn't say which collection this is, causing this assignment to fail.
I must choose an array, a list, a span, or a read-only span.
It is not allowed to omit the type, for example, by using the var keyword.
The compiler does not know which collection type to create.
Use a more concrete collection initializer with the var keyword.
You can also nest collection expressions to initialize a jagged array.
The so-called spread operator indicates that some components are actually collections.
You can combine spreads with individual values, too.
But what if there is a method receiving a sequence?
Then, you can use the collection expression without specifying the type.
The compiler will substitute some internal collection type in these cases.
Follow the link to the long video to learn more novel pieces of C# syntax.

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