memory

Why the types Memory and ReadOnlyMemory are struct instead of class? As they generally are used on asynchronous calls and are moved to the heap.

The docs say: "Arrays greater than 2 GB in total size are enabled on 64-bit platforms" and ".NET Framework 4.5 and later versions" and "The maximum index in any single dimension is 2,147,483,591 (0x7FFFFFC7) for byte arrays". I can create a two-dimensional [2, x] array that's 4GB in total...