To work with the code examples provided in this article ... a few longstanding limitations of the ref struct type have been removed. With C# 13, a ref struct instance now can be used in iterators ...

We’ll use this .NET 8 console application project to work with examples of classes, structs, and records in the subsequent sections of this article. A class in C# is a reference type.

Typically, you define a ref struct type when you need a type that also includes data members of ref struct types: In .NET, examples of a ref struct are xref:System ...

For example, you can't replace a xref ... It can't be a pointer type, but it can be any reference type, or any value type. You can use inline arrays with almost any C# data structure. Inline arrays ...