Non-Lazy Static Initialization Block in C# -

i need run code register type factory pattern. in java static initialization block or in c++ static constructor.

how do in c#? static constructor gets run lazily , since type never referred in code, never gets registered.

edit: tried test see registration code work. doesn't seem working though.

using system; using system.collections.generic; using system.linq; using system.text;  [assembly: assemblytest.registertofactory("hello, world!")]  namespace assemblytest {     [attributeusage(attributetargets.assembly, inherited = false, allowmultiple = true)]     sealed class registertofactoryattribute : attribute     {         public registertofactoryattribute(string name)         {             console.writeline("registered {0}", name);         }     }      class program     {         static void main(string[] args)         {         }     } } 

nothing gets printed.

how in constructor assembly level attribute?

example:

[attributeusage(attributetargets.assembly, inherited = false, allowmultiple = true)] sealed class registertofactoryattribute : attribute {     public type typetoregister { get; set; }      public registertofactoryattribute(type typetoregister)     {         typetoregister = typetoregister;          // registration code     } } 

usage:

[assembly:registertofactory(typeof(myclass))] 

--edit on assembly level attributes--

after doing research, figured load assembly attributes if queried:

example:

object[] attributes =     assembly.getexecutingassembly().getcustomattributes(         typeof(registertofactoryattribute), false); 

or

object[] attributes =     assembly.getexecutingassembly().getcustomattributes(false); 

don't know why putting code @ program load should it.

--edit--

i forgot:

have considered using mef?? it's great solution problem.

example:

class myfactory {     [importmany("myfactoryexport")]     public list<object> registrations { get; set; }      public myfactory()     {         assemblycatalog catalog = new assemblycatalog(system.reflection.assembly.getexecutingassembly());         compositioncontainer container = new compositioncontainer(catalog);         container.composeparts(this);     } }  [export("myfactoryexport")] class myclass1 { }  [export("myfactoryexport")] class myclass2 { }  [export("myfactoryexport")] class myclass3 { }