Usage-Guidelines.md

+**appsettings.json**
+- Do no store sensitive information, especially passwords in appsettings.json, use the Secret Manager.  Please see [Safe storage of app secrets in development in ASP.NET Core](https://docs.microsoft.com/en-us/aspnet/core/security/app-secrets?view=aspnetcore-6.0&tabs=windows) for reference.
+
+**Models**
+- Store all business class data models under **\<ProjectName\>.Business/Models**
+- Store all Kentico generated classes under **\<ProjectNam\e>.Business/Models/Generated**.  No need to create subfolders unless the number of models is greater than 20, then logically group them in subfolders.
+- No need to add Dto in the class name, example **HomePage**, not ***HomePageDto***
+- Name the model class the same as the Kentico Generated class, you just have a different namespace
+  - Kentico Generated Class: **CMS.DocumentEngine.Types.\<ProjectName\>.HomePage**
+  - Business Model Class: **\<ProjectName\>.Business.Models.HomePage**
+
+**Repositories**
+- Store all repositories under **\<ProjectName\>.Business/Repositories**.  No need to create subfolders unless the number of repositories is greater than 20, then logically group them in subfolders.
+- Always inherit from **XperienceAdapter.Repositories.BasePageRepository\<\<BusinessClass\>, \<GeneratedClass\>\>**
+    - `public class HomePageRepository : BasePageRepository<HomePage, CMS.DocumentEngine.Types.<ProjectName>.HomePage>`
+- If custom methods are needed to simplify data access to repositories, create an interface for the repository and have the repository inherit from both the interface and BasePageRepository.
+
+    ```
+    public interface IHomePageRepository
+    {
+        public HomePage GetHomePage();
+    }
+
+    public class HomePageRepository : BasePageRepository<HomePage, CMS.DocumentEngine.Types.<ProjectName>.HomePage>, IHomePageRepository
+    {
+        public HomePage GetHomePage()
+        {
+          ....
+        }
+    }
+    ```
+
+** Unit Testing **
+- Create unit tests for all repositories with custom methods, otherwise, not needed
+- Create unit tests for all components, mock repositories if retrieving data for the component