c# - Parameter type is less accessible than method -

I have a very early programmers have migraines for me all day.

below code error "parameter of the method is less accessible" on-line "public static Int Nuusser event (user event input)"

  public partial class GameWebService: System.Web.UI.Page {protected void Page_Load object sender, Iventaarjis e) {} [Vebmide] public static Int Nuusravent (User Event input input) {return Inputkiventid; }} Public class UserEventInput {public string member} {get; Set; } Public int eventid {get; Set; } Public Interpretation {get; Set; } Public int levelid {get; Set; Thanks Benjamin and Sase, 
 I totally stupid. You are right 
 In fact, the parameter class code, it's any other The cc was disconnected from the file and was pasted here. 
 but I did not save the second CC file to disk ....... so 2nd class with the same name within the same namespace ... I'm an idiot.