Update Part-10.md

docs/en/Tutorials/Part-10.md

@@ -70,7 +70,7 @@ We prefer to **delete the database** {{if DB=="EF"}}(you can run the `Drop-Datab
 
 ### Update the EF Core Mapping
 
-Open the `BookStoreDbContextModelCreatingExtensions` class under the `EntityFrameworkCore` folder of the `Acme.BookStore.EntityFrameworkCore` project and change the `builder.Entity<Book>` part as shown below:
+Locate to `OnModelCreating` method in the `BookStoreDbContext` class that under the `EntityFrameworkCore` folder of the `Acme.BookStore.EntityFrameworkCore` project and change the `builder.Entity<Book>` part as shown below:
 
 ````csharp
 builder.Entity<Book>(b =>
@@ -88,7 +88,7 @@ builder.Entity<Book>(b =>
 
 The startup solution is configured to use [Entity Framework Core Code First Migrations](https://docs.microsoft.com/en-us/ef/core/managing-schemas/migrations/). Since we've changed the database mapping configuration, we should create a new migration and apply changes to the database.
 
-Open a command-line terminal in the directory of the `Acme.BookStore.EntityFrameworkCore.DbMigrations` project and type the following command:
+Open a command-line terminal in the directory of the `Acme.BookStore.EntityFrameworkCore` project and type the following command:
 
 ````bash
 dotnet ef migrations add Added_AuthorId_To_Book
@@ -121,7 +121,7 @@ migrationBuilder.AddForeignKey(
 * Creates an index on the `AuthorId` field.
 * Declares the foreign key to the `AppAuthors` table.
 
-> If you are using Visual Studio, you may want to use `Add-Migration Added_AuthorId_To_Book -c BookStoreMigrationsDbContext` and `Update-Database -c BookStoreMigrationsDbContext` commands in the *Package Manager Console (PMC)*. In this case, ensure that {{if UI=="MVC"}}`Acme.BookStore.Web`{{else if UI=="BlazorServer"}}`Acme.BookStore.Blazor`{{else if UI=="Blazor" || UI=="NG"}}`Acme.BookStore.HttpApi.Host`{{end}} is the startup project and `Acme.BookStore.EntityFrameworkCore.DbMigrations` is the *Default Project* in PMC.
+> If you are using Visual Studio, you may want to use `Add-Migration Added_AuthorId_To_Book -c BookStoreMigrationsDbContext` and `Update-Database -c BookStoreMigrationsDbContext` commands in the *Package Manager Console (PMC)*. In this case, ensure that {{if UI=="MVC"}}`Acme.BookStore.Web`{{else if UI=="BlazorServer"}}`Acme.BookStore.Blazor`{{else if UI=="Blazor" || UI=="NG"}}`Acme.BookStore.HttpApi.Host`{{end}} is the startup project and `Acme.BookStore.EntityFrameworkCore` is the *Default Project* in PMC.
 
 {{end}}