C# 0 The Complete Reference

PacketHeader

 is a good choice for a 

struct

 because it contains only a small amount of data 

and does not use inheritance or even contain methods. As a structure, 

PacketHeader

 does 

not incur the additional overhead of a reference, as a class would. Thus, any type of 

transaction record can use 

PacketHeader

 without affecting its efficiency.

As a point of interest, C++ also has structures and uses the 

struct

 keyword. However, 

C# and C++ structures are not the same. In C++, 

struct

 defines a class type. Thus, in C++, 

struct

 and 

class

 are nearly equivalent. (The difference has to do with the default access of 

their members, which is private for 

class

 and public for