https://piotrbach.com/topics/net Explore practical .NET and ASP.NET Core guides on architecture, APIs, performance, maintainability and production engineering for modern web applications. Thu, 16 Jul 2026 09:27:34 GMT Thu, 24 Sep 2026 17:41:18 GMT en BachPlatform / Umbraco CMS https://piotrbach.com/blog/aspnet-core-architecture/ ASP.NET Core does not force you into one application architecture. That freedom is useful, but it also makes it easy to accumulate layers, abstractions and infrastructure without being clear about the problem each one solves. Sat, 22 Aug 2026 10:00:00 GMT Piotr Bach https://piotrbach.com/blog/aspnet-core-architecture/ https://piotrbach.com/blog/defensive-programming-in-dotnet/ A production-focused guide to designing explicit contracts, handling realistic failures, protecting trust boundaries, and recognizing defensive-programming signals during .NET code reviews and technical audits. Sun, 16 Aug 2026 06:00:00 GMT Piotr Bach https://piotrbach.com/blog/defensive-programming-in-dotnet/ https://piotrbach.com/blog/enable-brotli-gzip-compression-aspnet-core/ Configure ASP.NET Core Response Compression Middleware for Brotli and Gzip, understand the HTTPS and compression-level trade-offs, and verify the result in the browser. Wed, 01 Jan 2025 06:00:00 GMT Piotr Bach https://piotrbach.com/blog/enable-brotli-gzip-compression-aspnet-core/ https://piotrbach.com/blog/send-email-with-sendgrid-smtp-in-csharp-and-net-framework-48/ Send email through SendGrid's SMTP relay from a .NET Framework 4.8 application using System.Net.Mail.SmtpClient. The tested example includes HTML email, attachments, reply-to, TLS, error handling, and sender verification. Sun, 10 Nov 2024 06:00:00 GMT Piotr Bach https://piotrbach.com/blog/send-email-with-sendgrid-smtp-in-csharp-and-net-framework-48/ https://piotrbach.com/blog/how-to-fix-ssl-certificate-trust-issues-when-connecting-to-sql-server/ Learn how to fix the SQL Server error “The certificate chain was issued by an authority that is not trusted”, why it has become more common with newer SQL clients, and when TrustServerCertificate=True is an acceptable workaround. Sun, 14 Jul 2024 06:00:00 GMT Piotr Bach https://piotrbach.com/blog/how-to-fix-ssl-certificate-trust-issues-when-connecting-to-sql-server/ https://piotrbach.com/blog/fix-syntactically-invalid-ehlo-argument-smtpexception-in-csharp/ If System.Net.Mail.SmtpClient sends an invalid hostname in the SMTP EHLO command, some mail servers reject the connection before the message is sent. Here is how to identify the cause and choose the right fix. Tue, 02 Apr 2024 06:00:00 GMT Piotr Bach https://piotrbach.com/blog/fix-syntactically-invalid-ehlo-argument-smtpexception-in-csharp/ https://piotrbach.com/blog/how-to-create-a-sql-server-login-for-a-windows-domain-user-with-powershell/ If an existing Windows domain account receives Login failed for user because SQL Server has no corresponding login, you can create the Windows-authenticated SQL Server login from PowerShell. This article keeps the original SMO-based approach while clarifying the permissions and security implications. Sun, 25 Feb 2024 06:00:00 GMT Piotr Bach https://piotrbach.com/blog/how-to-create-a-sql-server-login-for-a-windows-domain-user-with-powershell/ https://piotrbach.com/blog/testing-aspnet-core-action-filters-with-xunit/ Learn how to unit and integration test ASP.NET Core action filters with xUnit, real filter contexts, short-circuit checks, and WebApplicationFactory. Sun, 14 Jan 2024 06:00:00 GMT Piotr Bach https://piotrbach.com/blog/testing-aspnet-core-action-filters-with-xunit/ https://piotrbach.com/blog/implementing-async-action-filters-in-aspnet-core/ Learn how IAsyncActionFilter works in ASP.NET Core, when to use it, how to short-circuit safely, inject services, and avoid production mistakes. Sat, 13 Jan 2024 06:00:00 GMT Piotr Bach https://piotrbach.com/blog/implementing-async-action-filters-in-aspnet-core/ https://piotrbach.com/blog/authenticate-wordpress-users-from-dotnet-with-jwt-rest-api/ Authenticate an existing WordPress user from a .NET application by sending the user's credentials to the JWT Authentication for WP REST API token endpoint. The flow returns a JWT when WordPress accepts the credentials and can be exercised from C# and xUnit. Sun, 19 Nov 2023 06:00:00 GMT Piotr Bach https://piotrbach.com/blog/authenticate-wordpress-users-from-dotnet-with-jwt-rest-api/