.net - Visual C# - Missing partial modifier -

i error saying "missing partial modifier on declaration of type 'projectname.main'; partial declaration of type exists. can read error, because have classes same name. work if modify main class public partial class main : form want know why gives me error. need initializecomponent within main(), tried creating method start() , calling main.start() in load event, form loads blank.

namespace projectname {     public class main : form     {         public main() // method: starts main form         {             initializecomponent();         }          public void main_load(object sender, eventargs e)         // on load of main class, handle events , arguments         {             main main = new main();             main.getcurrentdomain();         }          public void getcurrentdomain() // method: current domain         {             domain domain = domain.getcurrentdomain();         }     } // ends main class } 

assuming windows forms app, problem visual studio winforms designer has created file (e.g. main.designer.cs) with:

public partial class main : form 

to contain designer-generated code.

your partial class source merged - can only happen when both source files declare class partial. otherwise, you're trying declare 2 classes same name in same namespace, prohibited c#.