There's a stray period in an @using statement that was copied over from the blog post: _Imports.razor section.

Document Details

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• ID: d64b8062-f910-a918-c5db-b2b67708602c
• Version Independent ID: 56c6cc6e-be94-d164-947c-cb14dbe91a19
• Content: Blazor layouts
• Content Source: aspnetcore/blazor/layouts.md
• Product: aspnet-core
• Technology: aspnetcore-blazor
• GitHub Login: @guardrex
• Microsoft Alias: riande