Visual Studio Add - In : Item template does not get included into project.

Hi 

I am creating a Visual Studio add in in which I am successfully able to add the project using custom project template. I am successfully able to add Item from the custom Item template that I have created but when I explore the solution explorer I see that the Item template files are excluded from the project. They were copied to the Solution but were excluded.

I am trying to add it using C# code. The following code would help better in understanding.

Any pointers in this regards would be appreciated.

Thanks and Regards