TIOBE Index Predicts C# as 2023 'Language of the Year' After 2022 Near-Miss 

The best JavaScript debugging tools for 2018 and beyond 

I commonly hear the phrase “The web application worked in the pre-production environment and now is encountering issues in production and the server’s configuration are identical!” when I appear onsite to help assist with the resolution of the issues. Upon further investigation, an IIS module has not been installed on the production server, or the configuration is different for an application pool setting between the pre-production and production environments. This is a very common scenario I encounter in the field and here are some suggestions on how to determine differences between IIS servers in an IIS farm environment or between servers in different environments, such as pre-production and production. Keeping server configuration and content synchronized is always a challenge and I hope these suggestions help out.

What I've learned from 20 years of programming in C# with Joe Albahari with Q&A session - YouTube
In April 2001, I wrote and published my first C# program. Join me in discovering the most valuable principles that I've learned in the 20 years of C# programming that followed. We'll cover a range of topics, with plenty of samples and useful code that you can take away.

00:00 - Introduction
01:04 - Types
18:55 - Functional Programming
19:43 - What Defines Functional Programming?
33:26 - Lazy Values
36:20 - Cache a function - Memoizer
41:49 - Using a Closure instead of a Class
43:24 - Memoizer example
45:07 - Asynchronous Programming
47:58 - How do we abstract around Futures?
53:54 - Asynchronous locking
58:04 - Implementing A-synch lock with Semaphore
01:09:48 - Await inside a UI method vs a library method
01:18:04 - Using Exceptions
01:36:18 - Implementing a Retry
01:39:02 - IEither interface
01:39:58 - Downloading samples on LINQPad
01:40:27 - Q&A Session 

Use Rust or C#, abandon C++: Five Eyes agencies warn about memory safety in programming languages 

Issues Fixed in 15.9.21

• Fixed a bug where the .NET Profiling tools couldn't be installed on non-enterprise versions of Visual Studio 2017 when using an offline installer.
• Fixed C++ compiler bug where a static_cast in a decltype would evaluate incorrectly. To minimize disruptions to existing codebases, in VS2017 this fix takes effect when the (newly added) /d1decltypeIdentityConversion switch is thrown.
• New Spectre mitigation options in C++ compiler: /Qspectre-load & /Qspectre-load-cf for speculative load hardening.

Security Advisory Notices

• Diagnostics Hub Standard Collector Service Elevation of Privilege Vulnerability
• A spoofing vulnerability exists when creating an Outlook Web-Addin if multi-factor authentication is enabled

.NET Framework is the implementation of .NET that’s installed on over one billion machines and thus needs to remain as compatible as possible. Because of this, it moves at a slower pace than .NET Core.  

• XAML designer for UWP - control properties not displayed
• UWP XAML designer doesn't update elements on updating XAML code
• XAML properties and document structure
• Properties window not showing the properties when clicking an object
• Unable to see properties of any items
• Installation error when trying to connect to the Mac: "The Xamarin.iOS version installed on 'x' (12.8.0.2) is newer than your version".
• Fixed right click solution name in titlebar VS crash bug.
• Improved performance for customers with the Azure workload installed.
• Corrected errors during restore and build on SDK-based projects that use 3rd party SDKs to target UWP platforms.
• Fixed a bug in C# compiler where it was not properly warning customers about incomplete interface implementations.
• Improved error messaging in Visual Studio Tools for Kubernetes.
• Fixed error when adding a comment in PR for SymbolCheck.