Project Lightning / Next Generation Windows Services (NGWS) internal development

Internal teams at Microsoft begin conceptualizing and developing a new unified platform and language, initially codenamed 'Project Lightning,' which evolved into 'Next Generation Windows Services' (NGWS). This was the genesis of what would become the .NET Framework.

Significance

This period marked the crucial foundational work, language design (C#), and runtime architecture that would define the entire .NET ecosystem, driven by the need to compete with Java and simplify Windows development.