[ 1 · 2 · 3 · 4 · 5 · 6 · 7 ] If you are familiar with C#, you should be familiar with the difference between C#’s struct and class declarations. Namely, a struct is a value type and a class is a reference type, meaning that if you pass a struct to a function, its default behavior is for the entire struct to be copied into the function’s parameter, so any modifications made to it won’t affect whatever was passed in.