Merge pull request #4948 from abpframework/berkan/specify-folders-in-the-tutorial

Folders in the tutorial are specified.

docs/en/Tutorials/Part-1.md

@@ -92,7 +92,7 @@ namespace Acme.BookStore.Books
 
 ### BookType Enum
 
-The `Book` entity uses the `BookType` enum. Create the `BookType` in the `Acme.BookStore.Domain.Shared` project:
+The `Book` entity uses the `BookType` enum. Create a `Books` folder (namespace) in the `Acme.BookStore.Domain.Shared` project and add a `BookType` inside it:
 
 ````csharp
 namespace Acme.BookStore.Books
@@ -293,7 +293,7 @@ In this section, you will create an application service to get, create, update a
 
 ### BookDto
 
-`CrudAppService` base class requires to define the fundamental DTOs for the entity. Create a DTO class named `BookDto` into the `Acme.BookStore.Application.Contracts` project:
+`CrudAppService` base class requires to define the fundamental DTOs for the entity. Create a `Books` folder (namespace) in the `Acme.BookStore.Application.Contracts` project and add a `BookDto` class inside it:
 
 ````csharp
 using System;
@@ -340,7 +340,7 @@ namespace Acme.BookStore
 
 ### CreateUpdateBookDto
 
-Create another DTO class named `CreateUpdateBookDto` into the `Acme.BookStore.Application.Contracts` project:
+Create a `CreateUpdateBookDto` class in the `Books` folder (namespace) of the `Acme.BookStore.Application.Contracts` project:
 
 ````csharp
 using System;
@@ -391,7 +391,7 @@ namespace Acme.BookStore
 
 ### IBookAppService
 
-Next step is to define an interface for the application service. Create an interface named `IBookAppService` in the `Acme.BookStore.Application.Contracts` project:
+Next step is to define an interface for the application service. Create an `IBookAppService` interface in the `Books` folder (namespace) of the `Acme.BookStore.Application.Contracts` project:
 
 ````csharp
 using System;
@@ -418,7 +418,7 @@ namespace Acme.BookStore.Books
 
 ### BookAppService
 
-Implement the `IBookAppService`, as named `BookAppService`, in the `Acme.BookStore.Application` project:
+It is time to implement the `IBookAppService` interface. Create a new class, named `BookAppService` in the `Books` namespace (folder) of the Acme.BookStore.Application project:
 
 ````csharp
 using System;

docs/en/Tutorials/Part-4.md

@@ -78,7 +78,7 @@ If you had created a data seed contributor as described in the [first part](Part
 
 ## Testing the BookAppService
 
-Create a test class named `BookAppService_Tests` in the `Acme.BookStore.Application.Tests` project:
+Add a new test class, named `BookAppService_Tests` in the `Books` namespace (folder) of the `Acme.BookStore.Application.Tests` project:
 
 ````csharp
 using System.Threading.Tasks;

docs/en/Tutorials/Part-5.md

@@ -58,7 +58,7 @@ ABP Framework provides an [authorization system](../Authorization.md) based on t
 
 A permission must have a unique name (a `string`). The best way is to define it as a `const`, so we can reuse the permission name.
 
-Open the `BookStorePermissions` class inside the `Acme.BookStore.Application.Contracts` project and change the content as shown below:
+Open the `BookStorePermissions` class inside the `Acme.BookStore.Application.Contracts` project (in the `Permissions` folder) and change the content as shown below:
 
 ````csharp
 namespace Acme.BookStore.Permissions
@@ -84,7 +84,7 @@ This is a hierarchical way of defining permission names. For example, "create bo
 
 You should define permissions before using them.
 
-Open the `BookStorePermissionDefinitionProvider` class inside the `Acme.BookStore.Application.Contracts` project and change the content as shown below:
+Open the `BookStorePermissionDefinitionProvider` class inside the `Acme.BookStore.Application.Contracts` project (in the `Permissions` folder) and change the content as shown below:
 
 ````csharp
 using Acme.BookStore.Localization;

docs/en/Tutorials/Part-6.md

@@ -204,7 +204,7 @@ namespace Acme.BookStore.Authors
 
 > **DDD tip**: Do not introduce domain service methods unless they are really needed and perform some core business rules. For this case, we needed to this service to be able to force the unique name constraint.
 
-Both methods checks if there is already an author with the given name and throws a special business exception, `AuthorAlreadyExistsException`, defined in the `Acme.BookStore.Domain` project as shown below:
+Both methods checks if there is already an author with the given name and throws a special business exception, `AuthorAlreadyExistsException`, defined in the `Acme.BookStore.Domain` project (in the `Authors` folder) as shown below:
 
 ````csharp
 using Volo.Abp;

docs/en/Tutorials/Part-8.md

@@ -339,7 +339,7 @@ public async Task DeleteAsync(Guid id)
 
 You can't compile the code since it is expecting some constants declared in the `BookStorePermissions` class.
 
-Open the `BookStorePermissions` class inside the `Acme.BookStore.Application.Contracts` project and change the content as shown below:
+Open the `BookStorePermissions` class inside the `Acme.BookStore.Application.Contracts` project (in the `Permissions` folder) and change the content as shown below:
 
 ````csharp
 namespace Acme.BookStore.Permissions