.NET is an umbrella term for the platform ecosystem that includes, among other things: * Common Language Runtime(aka CLR, aka runtime) and its JIT compiler Ryu

.NET is an umbrella term for the platform ecosystem that includes, among other things: * Common Language Runtime(aka CLR, aka runtime) and its JIT compiler RyuJIT * The C# language and it's compiler Roslyn * The base class library and framework class libraries(aka BCL and FCL) * ASP.NET the flagship web application framework * F# the platforms flagship functional language * etc etc It's all ".NET"