Framework Design (version 2nd) CLR Via C # (1)

8.8 declared parameter types of methods

To sum up two points: 1. Specify the weakest type as much as possible for the parameter type, and it is best to define interfaces on the base class-design the system structure relative to the interface system used in C;

 

Public void ManipulateItems <T> (IEnumerable <T> collection ){...}

// Do not use

 

You can also use the basic class system. For example, C ++ does not have a separate interface definition.

Public void ProcessBytes (Stream someStream ){...}
// Do not use
Public void ProcessBytes (FileStream fileStream ){...}

Ii. Specify the strongest type as much as possible for the return type

Public IList <String> GetStringCollection (){...}
// Instead
Public List <String> GetStringCollection (){...} Public FileStream OpenFile (){...}
// Instead
Public Stream OpenFile (){...}