If  you are generating a project file or a list of entities or classes, use the BaseSingleFileExample.tt template.

 

Steps

1. Open the CodeGenTemplates.sln file
2. Create a new Folder for the template under Languages
3. Create a new T4 template in the newly created folder
4. Copy and paste the contents of the Example\BaseSingleFileExample\BaseSingleFileExample.tt into the newly created template.
5. Make the desired changes to your template