Book Image

Mastering C# and .NET Framework

Book Image

Mastering C# and .NET Framework

Overview of this book

Mastering C# and .NET Framework will take you in to the depths of C# 6.0/7.0 and .NET 4.6, so you can understand how the platform works when it runs your code, and how you can use this knowledge to write efficient applications. Take full advantage of the new revolution in .NET development, including open source status and cross-platform capability, and get to grips with the architectural changes of CoreCLR. Start with how the CLR executes code, and discover the niche and advanced aspects of C# programming – from delegates and generics, through to asynchronous programming. Run through new forms of type declarations and assignments, source code callers, static using syntax, auto-property initializers, dictionary initializers, null conditional operators, and many others. Then unlock the true potential of the .NET platform. Learn how to write OWASP-compliant applications, how to properly implement design patterns in C#, and how to follow the general SOLID principles and its implementations in C# code. We finish by focusing on tips and tricks that you'll need to get the most from C# and .NET. This book also covers .NET Core 1.1 concepts as per the latest RTM release in the last chapter.
Table of Contents (21 chapters)
Mastering C# and .NET Framework
Credits
About the Author
Acknowledgements
About the Reviewer
www.PacktPub.com
Preface
Index

Interoperability


The other big topic we want to cover in this chapter is the possibility of a .NET application "talking" to other installed applications in our system. This talking means instantiating these applications and interchanging data between them or asking the other applications to perform tasks we should program ourselves.

Initially (in versions previous to C# 4.0), this technology was exclusively COM-based. The trick was done via Interop using some DLLs called Type Libraries (TLB) or Object Libraries (OLB). The programmer should then use (reference) these libraries and instantiate their internal objects, which represent the internal components of the application to communicate with.

This was possible using a Runtime Callable Wrapper (RCW) whose operational schema is explained in the following figure:

Let's see how communication was made between the COM and .NET worlds. You have to keep in mind that COM is not a managed environment, and it executes instructions native to the Windows...