As you might now, .NET Core 3.0 SDK and Runtime are available on Raspberry Pi (actually, any Linux ARM32 or ARM64 architectures, as well as x64). With the new 3.0 version of .NET Core you can run your console or ASP.NET Core web site\api projects on a cheap 35$ device without any problems (do not expect high performance). We are using Raspberry Pi 3 to control our LinkedIn and Instagram automation (I will tell you about these projects when they are ready for public) via .NET Core console applications.

If you need to only loop through the diagonal elements of the two-dimensional array you can use the following C# code (but should be more or less the same for any programming language). It calculates the diagonal index based on a simple formula and has O(n) complexity, where n = max(width, height)

This guide is helpful for people who decided to migrate a website to another web server and have SSL certificates from Let's Encrypt. This article describes the process for Ubuntu 18.04 but can also be used for other Linux distros (maybe with some small changes).

How to build, test and deploy your ASP.NET Core application in a single click (commit & push)? In this article I will answer this question and show you how to configure CI and CD with Docker and Bitbucket.

LinkedIn is the most popular business-oriented social network. A lot of us have an account there, but not a lot write something there. Most of the time you can see posts from recruiters about the new "awesome" position in "the best" company in the world, but almost no articles about technical aspects of the work.

Finally! You can now use bash and almost any linux program on your Windows 10 machine. You do not need cygwin or MinGW anymore! This will give you opportunity to use rich variety of tools available only on linux. For example wrk - a great HTTP benchmarking tool which I plan to use for a new ASP.NET Core 1.1 benchmark. Linux's user space available from Windows 10 version 1607. But it's disabled by default. To enable it you should: Go to Settings -> Updates & security -> for developers a...

Here is an example of the nginx server block (Virtual Hosts) which you can use to host multiple web sites on the same server. Just replace example.com with your own domain name. Do not forget to create all required folders and sent right permissions. Copy one of those templates to the /etc/nginx/sites-available/example.com Proxy example # Ivan Derevianko aka druss http://ivanderevianko.com # Force without domain domain without www server { server_name www.example.com; listen 80; rewrite ^(.*) ht...

.NET Core framework provides one very useful feature - Self-contained application. You don't need to install any .net runtime on your computer, you can just copy your application to the target host and run it. Furthermore, you can run it on any platform (Windows, Linux, OSX)! When you create a self-contained application, after publishing, you will see the whole .net runtime next to your application. There are some advantages: You do not need to have installed .NET Core on a target machine You ca...

If you are using Selenium WebDriver as a web crawler and thinking that it's too slow, welcome inside! In this article, we will see how to make page parsing time around 50 times faster. As an example, I will parse comments from another article from this blog. I will first parse it using default WebDriver API (FindElement... methods) and then will compare it to CsQuery Here is WebDriver parsing code: var driver = new ChromeDriver(); driver.Navigate().GoToUrl("/2014/07/fixed-setup-was-unable-t...

If you want to run C# application (mono) with Selenium ChomeDriver on Ubuntu Server 16.04 in headless mode, you definitely should read this article. We will use Xvfb as X server, this will let us emulate "headless" mode because Xvfb performs all graphical operations in memory without showing any screen output. Install mono sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys 3FA7E0328081BFF6A14DA29AA6A19B38D3D831EF echo "deb http://download.mono-project.com/repo/debian whe...