c# - pass ENUM(CustomType) to Another Class, where that ENUM doesn't exist -

//question update

let's say, new project, create file, have:

namespace a{     public enum mydates{        19a,        19b,        19c,        .....     }      ....      public class  myabc : transaction{          ....         string smth = myfunc(mydates.19a);         ....     } } 

i have custom library-file (let's same, or different namespace), include in every projects , fill new methods according needs. now, want add method there, can called whenever need pass mydates type:

namespace a{      partial class transaction{       ......        public string myfunc(mydates smth){              return (smth == mydates.19a ? 'hi' : (smth == mydates.19b ? ( etc... ) ) )  ;        }        ......     } } 

however, namespace b won't compile (because mydates doesnt exist there). never call method without enum, , why still requires me define enum within namespace again? mydates dynamic , can changed (removed values), , don't want modify library every time.

mydates dynamic , can changed (removed values) , dont want modify library everytime.

the way achieve enum consuming code only access enum via reflection (enum.getnames() / enum.getvalues()), , not rely on values existed @ compile-time. can done, suggests maybe enum not best choice data, if removing items. removing members inherently change can break consumers.