c# - "Type or namespace name *name* cannot be found" Error only in method declarations -

i getting "type or namespace name name cannot found" error, but in method declarations, , on 2 specific object types:

 public list<transit> getstops() //this throws error  {       list<transit> stops = new list<transit>(); //this not throw error 

if try access transit through path.to.namespace.transit in method declaration, still error. visual studio 2012 can find class in auto suggestions both in method declaration, , below (before try build again). code below throw no errors:

 public list<string> getstops()   {       list<transit> stops = new list<transit>(); //no error 

this occurs 2 classes located in namespace.

public stop getcurrentstop() //error {    stop stop = new stop(); // no error 

the rest of classes in namespace not throw error. both classes public , contain constructor. visual studio list both objects suggestions, , map them correct namespace in code below method declaration.

here example of 1 of classes:

using system; using system.collections.generic; using system.linq; using system.text;  namespace path.to.namespace {     public class transit     {         public string id {  get; private set; }         public string name { get; private set; }         public travel mode {get; private set;} //class in same namespace         public location stoppoint { get; private set; } //class in same namespace          public transit(string id, string name, travel mode, location stoppoint)         {             id = id;             name = name;             mode = mode;             stoppoint = stoppoint;          }     } } 

the other 1 similar, different object types. , restarting pc/vs did not solve issue