Goal : Move Blazor components like Account pages to a separate project in order to have a clear separation of features in different modules.

• Create a new Blazor app ModularBlazor.App with Authentication.
• Execute dotnet ef update database to create the database.
• Create a new user using the Register page and login to test authenticated pages.

• Create project ModularBlazor.Account in Modules folder.
• Add reference of ModularBlazor.Account to ModularBlazor.App application.
• Change Project Sdk to <Project Sdk="Microsoft.NET.Sdk.Razor">
• Add AspNetCore assemblies references to ModularBlazor.Account.csproj:

		<FrameworkReference Include="Microsoft.AspNetCore.App" />
		<PackageReference Include="Microsoft.AspNetCore.Components" Version="9.0.1" />
		<PackageReference Include="Microsoft.AspNetCore.Components.Web" Version="9.0.1" />

• Move Component\Account Pages to ModularBlazor.Account project.
• Rename namespaces to ModularBlazor.Account.Components.Account.
• Add _Imports.razor file to ModularBlazor.Account.Components folder
• Change scope of internal sealed classes to public to use them in the main application.

• Add Routes.razor.cs below Routes.razor, declare static AdditionalAssemblies and add the ModularBlazor.Account Assembly:

public partial class Routes
{
    public static List<Assembly> AdditionalAssemblies = new List<Assembly>()
    {
        typeof(ModularBlazor.Account.Components._Imports).Assembly
    };
}

• In Program.cs, call the AddAdditionalAssemblies() method in order to load the module assemblies in the main application:

App.MapRazorComponents<App>()
    .AddInteractiveServerRenderMode()
    .AddAdditionalAssemblies(Routes.AdditionalAssemblies.ToArray());

• Move Components\Layout folder to ModularBlazor.Account project (ManageLayout needs the main Layout).
• Move Data folder to ModularBlazor.Account project (ApplicationDbContext, ApplicationUser, ...).

• Create project ModularBlazor.Data
• Add Entity Framework Core packages to ModularBlazor.Data.csproj.
• Move Data folder to ModularBlazor.Data.
• Add reference of ModularBlazor.Data to ModularBlazor.Account project.
• Change namespace ModularBlazor.App.Data to ModularBlazor.Data.

• Create project ModularBlazor.Layout
• Move Layout folder to ModularBlazor.Layout project.
• Add reference of ModularBlazor.Layout to ModularBlazor.Account project and to ModularBlazor.App application.
• Change namespaces to use ModularBlazor.Layout.Components.Layout where needed (Routes, Account\Shared\ManageLayout).

Inspired by BlazorAdmin