How to use forward declaration of class from different namespaces?

No I do not get notification when messages are edited.

There are still numerous syntax errors in the sample code. It helps to have sample code that compiles so I can do a compile of my modifications to ensure it works.

I am still not sure what you need. The following compiles and successfully executes. What else do you need the code to do that you are having problems with?

mainform.h

text.h

next.h

interface.h

Sample use

Sam check once again now i have edited the code. I made it more clear. I have edited yesterday itself immediately after you post that question. I am not sure whether edited post causes to be sent or not, so i had post again.

Karthik I have some very valid concerns. I won't stop trying to explain the problem until someone understands. If you don't understand then say so but don't tell me to stop trying.

Your sample code helps. If you had done that in the beginning then that would have saved us all a lot of time. It is the type of thing I am trying to explain to you to do. That is a big part of what I am trying to say.

I still do not completely understand the problem.

I do not understand what "include text class in namespace2" means. A namespace is not #included so I do not know what you mean include in a namespace.

I also do not understand "access the properties of the both classes text and next". Where do you need to access those classes? Do you need to do that in the mainform class?

I think one barrier is that you need to think in terms of classes, not namespaces. Instead of trying to include a namespace I think you need to figure out how to use/access a class in another namespace.

Note that in the code you show above, the mainform class has a constructor and destructor for class1, not for mainform. I assume that is a mistake.

Sam, It's not good for both of us to prolong this discussion of ignorance. If you wanna say something say it straight away there the discussion should possibly end. It won't be nice for the people looking into posts of this kinda as well.

To the extent that you don't understand me, it would help everyone if Vuples were to help me help you but Vulpes does not.

When I say ignore, one way is that when I spent a couple of hours working on some sample code for you and you did not say a single word about it.

i have something like

//mainform.h
#include "interface.h"
#include "text.h"
#include "next.h"
using namespace2;
namespace namespace1
{
  public ref class mainform : public System::Windows::Forms::Form
  {
  static text ^ text_setting  = gcnew text;
  static next ^ next_setting   = gcnew next;
  mainform(void)//EDITED
  {
  }
  ~mainform(void)//EDITED
  {
  }
  }
}

//text.h
#include "interface.h"
using namespace2;
namespace namespace1
{
  public ref class text
  {
  public:
 String ^ text_name;//EDITED
   String ^ sid_data;//EDITED
     String ^ sample_string;//EDITED
  }
}

//next.h
namespace namespace1
{
  public ref class next
  {
  public:
    String  ^ _name;//EDITED
  Font  ^ _type;//EDITED
   String  ^ _aliaze;//EDITED
  }
}

//interface.h
using namespace1;
namespace namespace2
{
  public ref class 2
  {
   class2(void)
   {
   }
   ~class2(void)
   {
   }  
  }  
}

now mainform has access to both text and next classes. I cant include text class in namespace2 as that has already included interface which makes it a loop. Now if i want to access the properties of the both classes text and next how can i do that?

//EDITED
I want to use class text and class next properties in namespace2 i.e in class2
I dont have any problem using them in mainform, but i am not sure how to use it in class2 (i.e in namespace2).

Also Note that i have changed the class1 to mainform, yup it was a mistake.
Also note that i have added some properties to classes text and next which i want to use in class2 (i.e in namespace2)

I hope everything is clear now. If you have anything else you can definitely ask me sam as you did now.

Sam why do you use that word ignore ignore again and again i don't understand. Where did i ignore you i tried following you in the last post http://www.c-sharpcorner.com/Forums/Thread/159291/how-to-add-a-tree-structure-dynamically.aspx there was no proper reply. You didn't even ask me what was your doubt exactly. If you get some doubt in order to answer my question if you say that that doesn't answer my question. i didn't get you all that stuff, how can i move forward. I am not saying that i am correct, may be i am wrong but as a fresher you can't except me more than this. As you are experienced people i am putting my problem in front you, you should suggest something and you should be having patience to get answer from them as well. If not just don't even reply. But don't say that word again and again, it will reduce your self confidence as well and one day you may not even feel like replying to the posts expecting you will be ignored. This is neither good for you nor for the forum or me.

It will be interesting to see what happens in this thread. Based on past experience, it will erupt into a lengthy discussion because Vulpes attempted to answer the question without clarification and then Karthik will add a little bit more information and then it will go on and on. Based on past experience, the question will morph into a new question without a clear definition of the initial question.

And here is the frustrating part. I will sincerely try to help but I will be ignored. That hurts.

I tried to help you in that other thread and you ignored me. I can help you here but please do not ignore me.

I am different from Vulpes.  I prefer to have a better understanding of a problem than Vulpes does.

It is very possible that the problem is related to some fundamental design issues. If so then I will say so. I understand that it might be too late to fix the fundamental design issues. Please allow me to explain problems like that when they apply. I will do the best I can to solve the problem in spite of design problems if necessary.

Regardless, before I can help you with this problem, you need to clarify things better.