CREATING A MESH IN OBJ FORMAT

hello Manish ,thanks a lot for the answer. This article which you mentioned actually talks about reading a 3ds file and displaying the content in openGL.what i wish to do is to make a obj file which contains a mesh.the mesh will be created using triangles as the article explains however, i need to write the header first! All this i wish to do in c#. do you have any clue how it can be done. any method available for doing this in c# is desirable as this will make my job easier. thanks