Why is 16 byte the recommended size for struct in C#?

Question

I read the Cwalina book (recommendations on development and design of .NET applications).

He says that a good designed struct has to be less than 16 bytes in size (f

Answer 1

• Larger struct is not as efficient, but then.... if you HAVE more data, you have it. No sense talking about efficiency there.

• 64 bytes should be OK.

• The main reason possibly is copy operations.... which get IIRC slower if the struct is larger. And it must be copied around quite a lot.

I would normally advice into using a class here ;) But without knowing the content of the struct, it is a little tricky.