c# - Trying to Register package to COM -

i'm using regasm register .dll (derived .cs below) windows com. returns warning states there no type registered. thought because not of dependencies had default constructors; post-change same problem. question need define in classes explicitly stating used com object? if not, going wrong?

here minimal subset of 1 of classes (the main one):

public class almrest {     //state:     private string server;     private string domain;     private string project;     private string username;     private string password;     //     private string system;     //     private string assignedto;     private string responsible;     private string phase;     private string testenv;     //     private string sid;      //client/session state:      private httpclient client;     private cookiecontainer cookiejar;     private httprequestheaders mainheaders;     //     private cookie lwssokey;     private cookie qcsession;     private cookie sessionkey;     private cookie xsrftoken;     private cookie almuser;      //default\/     public almrest()     {         sid = environment.machinename;     }      public almrest(string[] authent, string sys, string[] tester)     {         server = authent[0];         domain = authent[1];         project = authent[2];         username = authent[3];         password = authent[4];          system = sys;          assignedto = tester[0];         phase = tester[1];         testenv = tester[2];          responsible = username;         schrodid = environment.machinename;          startup();     }      //for com/jni     public void setup(string s, string d, string pr, string u, string p)     {         server = s;         domain = d;         project = pr;         username = u;         password = p;         startup();     }      private void startup()     {         //@todo(later): find out how derive ssl-cert https         //handler.credentials = getsslcert();         cookiejar = new cookiecontainer();          httpclienthandler handler = new httpclienthandler();         handler.cookiecontainer = cookiejar;         client = new httpclient(handler);         client.baseaddress = new uri(server);         mainheaders = client.defaultrequestheaders;         //erase headers         mainheaders.clear();     }      //lots of methods (omitted)      //delegates\/ problem?     internal delegate entity factory(string entitiestype, params keyvaluepair<string, object>[] definition);     internal delegate entities subtypequery(string subtypes, params keyvaluepair<string, object>[] values);     internal delegate entity extractor(string field, object value, entities entities);     internal delegate bool lockself(string id, string entitiestype);     internal delegate bool unlockself(string id, string entitiestype);     internal delegate bool deleteself(string id, string entitestype);     internal delegate bool ammendproperty(string id, string entitiestype, params keyvaluepair<string, object>[] ammendments);     internal delegate list<delegate> inheritor(); } 

now, methods call object-model defined , of classes have default constructors too. more information need please let me know, left out methods because there on 20 of them. thanks.

i think problem in class. according example com class msdn. class must follow rules com visible:

exposing visual c# objects com requires declaring class interface, events interface if required, , class itself. class members must follow these rules visible com: + class must public.

• properties, methods, , events must public.
• properties , methods must declared on class interface.
• events must declared in event interface.

other public members in class not declared in these interfaces not visible com, visible other .net framework objects.

https://docs.microsoft.com/en-us/dotnet/csharp/programming-guide/interop/example-com-class