Welcome Back

See how you stack up against other learners. Track your progress, climb the ranks, and compete with the Dometrain community.

Learn PostgreSQL through hands-on coding exercises. Practice what you learn with interactive challenges designed for every level.

Learn C# through hands-on coding exercises. Practice what you learn with interactive challenges designed for everyone, from beginners to experts.

Get started with integrating AI into your .NET applications effectively using the latest LLM best practices.

Learn how to build and deploy .NET applications on AWS using CDK, Lambda, DynamoDB, S3, and more.

This guide covers every new C# 14 feature, explains its benefits, and provides practical code examples to help you navigate how you can use them.

Build a Retrieval-Augmented Generation (RAG) chatbot that can answer questions using your data.

Enable enterprise-grade real-time communication for your web apps with SignalR.

Master solution architecture and turn business needs into scalable, maintainable systems.

A step-by-step process to migrate ASP.NET Web APIs from .NET Framework to ASP.NET Core.

Let's make the hardest thing in programming easy for .NET software engineers.

Learn how to test any codebase in .NET with the latest version of xUnit, the industry-standard testing library.

This walkthrough is your hands-on entry point to create a basic C# console application that talks to ChatGPT using the OpenAI API.