Today, when I start visual studio and click on Add new Item I found that WebForm option is missing from visual studio templates. Thanks to Eric Hammersley who gave the perfect solution. To add missing templates you need to run following command on visual studio command prompt.
Close all instance of Visual Studio. Open visual studio command prompt and type,
Press Enter. Let the process be complete and now open visual studio. You will get all missing templates under Visual Studio installed templates.
Happy Programming !!