missing a using directive or an assembly reference?

I am getting this error Error 4 The type or namespace name 'Sample' could not be found (are you missing a using directive or an assembly reference?) F:\oadmin\sea\Controls\Dlg.c开发者_Go百科s 11 7 Controls

here i added Samplein reference section,,,then i used it as Using Sample,,i dont know why i am getting this error

this is the class

namespace sample
{

    public class Server
    {



        public class client
        {

        Bool sent = true

        }

}

}

Can i share exe,,this Sample is an exe

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Perhaps because your namespace is sample and not Sample? So if your Dlg namespace is different it needs to have a using sample line not using Sample.

Or perhaps your class is in another project within your solution and you need to include the hierarchy of namespaces?

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Your namespace "sample" is lowercase, but you are referring to it in uppercase "Sample" ...

EDIT: You Bool sent is internal, it cannot be accessed from outside of the assembly