This document provides an overview of C# .NET and related technologies. It discusses what .NET is, its architecture, compilation process and types of JIT compilation. It then introduces C# and covers its evolution. It also discusses object-oriented programming concepts in C#, ADO.NET components for connecting to data sources, ASP.NET for creating dynamic web pages, SQL Server for data storage and retrieval, and SQL Server authentication modes. It concludes by proposing a school management system as a sample project to demonstrate these concepts.