https://martynas.dev Writing on software engineering, consulting insights, and project write-ups from Martynas Samuilovas. en Thu, 14 Nov 2024 00:00:00 GMT https://martynas.dev/blog/asp-net-identity-management-with-keycloak https://martynas.dev/blog/asp-net-identity-management-with-keycloak A step-by-step guide to integrating an ASP.NET application with Keycloak for authentication and authorization using Docker Compose and MariaDB. Thu, 14 Nov 2024 00:00:00 GMT https://martynas.dev/blog/c-ef-migrations-with-kubernetes-jobs-and-mariadb https://martynas.dev/blog/c-ef-migrations-with-kubernetes-jobs-and-mariadb How to deploy MariaDB in Kubernetes and automate Entity Framework migrations with a bundled executable run as a Kubernetes Job. Mon, 11 Nov 2024 00:00:00 GMT https://martynas.dev/blog/c-applying-ef-migrations https://martynas.dev/blog/c-applying-ef-migrations A walkthrough of the different strategies for applying Entity Framework migrations, from CLI tools and SQL scripts to bundles and runtime migration. Fri, 08 Nov 2024 00:00:00 GMT https://martynas.dev/blog/handling-concurrency-conflicts-in-c-with-code-examples https://martynas.dev/blog/handling-concurrency-conflicts-in-c-with-code-examples A practical guide to optimistic and pessimistic concurrency control in EF Core, with SemaphoreSlim and DistributedLock examples in C#. Mon, 31 Jul 2023 00:00:00 GMT https://martynas.dev/blog/constraining-your-c-classes https://martynas.dev/blog/constraining-your-c-classes Why implicit, wide-open C# classes hurt code quality, and how adding functionality, concrete constructors, and validation constraints makes them more explicit and robust. Mon, 05 Jun 2023 00:00:00 GMT https://martynas.dev/blog/c-component-tests-with-code-examples https://martynas.dev/blog/c-component-tests-with-code-examples A practical guide to writing component tests in ASP.NET, including how they differ from unit and integration tests, with a full working example using WebApplicationFactory. Wed, 05 Apr 2023 00:00:00 GMT https://martynas.dev/blog/performance-battle-which-collection-is-the-fastest-in-c https://martynas.dev/blog/performance-battle-which-collection-is-the-fastest-in-c Benchmarking arrays, lists, hashsets, sorted sets, IEnumerable, and Parallel.For in C# with BenchmarkDotNet to see which collection type iterates fastest. Sun, 02 Apr 2023 00:00:00 GMT https://martynas.dev/blog/c-integration-tests-with-code-examples https://martynas.dev/blog/c-integration-tests-with-code-examples A practical guide to writing C# integration tests, covering database integration testing with Entity Framework and external HTTP service integration testing, with full code examples. Thu, 30 Mar 2023 00:00:00 GMT https://martynas.dev/blog/c-unit-test-tricks-that-will-actually-help-you https://martynas.dev/blog/c-unit-test-tricks-that-will-actually-help-you Practical C# unit testing best practices with code examples — from test class structure and test data generators to mocking, auto-mocking containers, and exception testing. Sat, 25 Mar 2023 00:00:00 GMT https://martynas.dev/blog/c-mappers-which-one-is-the-fastest https://martynas.dev/blog/c-mappers-which-one-is-the-fastest Benchmarking seven popular C# object-to-object mappers — Inline, Reflection, AutoMapper, TinyMapper, Mapster, ValueInjecter, and FastMapper — for speed and memory usage. Wed, 15 Mar 2023 00:00:00 GMT https://martynas.dev/blog/10-micro-api-ideas-to-make-money https://martynas.dev/blog/10-micro-api-ideas-to-make-money Ten simple, focused API ideas — from URL shortening to VIN lookups — that you can build and monetize with usage-based or subscription pricing. Sat, 11 Mar 2023 00:00:00 GMT https://martynas.dev/blog/7-awesome-tools-for-net-developers https://martynas.dev/blog/7-awesome-tools-for-net-developers A roundup of seven NuGet packages and libraries — from benchmarking and code coverage to validation and date/time handling — that make .NET development faster and more reliable. Wed, 08 Mar 2023 00:00:00 GMT https://martynas.dev/blog/building-a-website-scraping-tool-with-selenium-and-net https://martynas.dev/blog/building-a-website-scraping-tool-with-selenium-and-net A step-by-step guide to building a website scraping tool in .NET using Selenium and HtmlAgilityPack, from setting up a Dockerized Chrome driver to extracting data from HTML. Tue, 31 Jan 2023 00:00:00 GMT https://martynas.dev/blog/c-code-performance-optimizations-with-chatgpt https://martynas.dev/blog/c-code-performance-optimizations-with-chatgpt Putting ChatGPT to the test on three real C# performance optimization tasks, then benchmarking its suggestions against hand-written solutions. Thu, 26 Jan 2023 00:00:00 GMT https://martynas.dev/blog/c-net-interview-questions https://martynas.dev/blog/c-net-interview-questions A rundown of 30 core C# and .NET interview questions covering OOP fundamentals, memory management, async programming, and generics. Tue, 03 Jan 2023 00:00:00 GMT