I assume that you are an experienced COM developer who feels comfortable with COM basics such as interfaces, CoClasses, and apartments. This book is about COM+ component services, not the component technology used to develop a COM/DCOM or .NET component. You can still read the book without this experience, but you will benefit more by having COM under your belt. I assume you develop your components mostly in C++ and ATL and that you write occasional, simple client code in Visual Basic. I also use trivial C# in Chapter 10 to demonstrate how .NET takes advantage of COM+ services, but you don’t need to know C# to read that chapter. A .NET developer should also find this book useful: read and understand the services in Chapter 1 through Chapter 9, and then use Chapter 10 as a reference guide for the syntax of .NET attributes.