Blog - .NET

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How to create an ASP.NET Core Minimal API with Visual Basic .NET (there's no template)

- .NET
Visual Basic .NET (VB) is not dead, but it's not getting the same amount of love as C# or even F#. Luckily, all that is .NET can be used by all .NET languages including VB, so you can still use ASP.NET Core and Minimal APIs with the VB language.
Conversation between an iPhone user and the SMS bot. The user says "Hi" and the bot responds with "Welcome to the U.S. Representative lookup bot. Respond with your address. The user sends an address and the bot responds with "Your representative is Gerald E. Connolly (Democratic Party) representing Virginia"s 11th congressional district. Then the bot sends an image of the representative.

Find your US Representatives and Congressional Districts with SMS and ASP.NET Core

- .NET
Learn how to create an SMS bot that looks up U.S. Congressional Districts and Representatives using the Google Civic Information API, C#, ASP.NET Core Minimal API, and Twilio SMS.
.NET bot flying with a jetpack

How to Bulk Email with C# and .NET: Zero to Hero

- .NET
There are many ways to bulk email, each with their own strengths. Learn how to bulk email with C# and .NET using SendGrid.

Provide default configuration to your .NET applications

- .NET
Learn how to provide default options into your .NET configuration to reduce redundancy
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How to better configure C# and .NET applications for SendGrid

- .NET
Learn how to configure your .NET applications better for sending SendGrid emails
.NET Bot holding a browser URL bar and a toolbox

How to get the full public URL of ASP.NET Core

- .NET
Learn how to get the public full URL of your ASP.NET Core application
.NET Bot holding a browser URL bar and a toolbox

How to generate absolute URLs in ASP.NET Core

- .NET
Learn how to generate full absolute URLs in C# and ASP.NET Core web applications.
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How to better configure C# and .NET applications for Twilio

- .NET
Learn how to use multiple configuration sources, strongly-typed objects, and implement the options pattern in your .NET applications
.NET Bot holding a phone and bag with the Twilio logo

What's new in the Twilio helper library for ASP.NET (v5.73.0 - April 2022)

- .NET
Learn about what's new and old with the Twilio helper library for ASP.NET in version 5.73.0
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How to Send SMS without a Phone Number using C# .NET and an Alphanumeric Sender ID

- .NET
You don't always need a phone number to send SMS! Learn how to send text messages using Alphanumeric Sender IDs.
How to prevent Email HTML injection in C# and .NET

How to prevent email HTML injection in C# and .NET

- .NET
Learn how bad actors can inject HTML into your emails in your C# .NET applications and how to mitigate it.
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How to send ASP.NET Core Identity emails with Twilio SendGrid

- .NET
Learn how to use SendGrid to send account verification and password recovery emails in ASP.NET Core
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How to send Email in C# .NET using SMTP and SendGrid

- .NET
You can use the SendGrid APIs to send emails, but you can also use SMTP with SendGrid. Learn how to send emails using SMTP, SendGrid C# .NET
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Send Emails using C# .NET with Azure Functions and SendGrid Bindings

- .NET
Learn how to send emails from Azure Functions using C# .NET and the SendGrid Bindings
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Integrate ngrok into ASP.NET Core startup and automatically update your webhook URLs

- .NET
Learn to integrate ngrok into ASP.NET Core's startup process to create secure public tunnels and automatically handle Twilio's webhooks with a single command
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Integrate IndexNow with Umbraco CMS to submit content to search engines

- Umbraco
Umbraco is very extensible for ASP.NET developers. Learn how to integrate IndexNow into the Umbraco backoffice, so you can easily submit Umbraco content URLs to search engines that they will (re)crawl.
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Send Scheduled SMS with C# .NET and Twilio Programmable Messaging

- .NET
Learn how to schedule SMS with C# .NET and Twilio Messaging's latest feature: Scheduled Messaging!
.NET Bot

How to get ASP.NET Core's local server URLs

- .NET
Learn how to access the ASP.NET Core's local server URLs in Program.cs, in controllers using Dependency Injection, and in IHostedService or BackgroundService.
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How to send SMS with C# .NET and Azure Functions using Twilio Output Binding

- Azure
Twilio posts cloud communications trends, customer stories, and tips for building scalable voice and SMS applications with Twilio's APIs.
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How to send recurring emails in C# .NET using SendGrid and Quartz.NET

- .NET
Learn how to send recurring emails with C# .NET using Quartz.NET and SendGrid's APIs
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Send Emails using the SendGrid API with .NET 6 and C#

- .NET
Learn how to send emails using the SendGrid API with a .NET 6 console application and C#
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Introducing .NET Developer Niels Swimberghe

- .NET
Meet Niels Swimberghe, the newest member of the Developer Voices team at Twilio. Niels is a .NET developer and will be producing technical content for the .NET community.
Umbraco logo and Docker logo

How to run Umbraco 9 as a Linux Docker container

- Umbraco
Umbraco 9 has been built on top of .NET 5. As a result, you can now containerize your Umbraco 9 websites in Linux containers. Learn how to containerize Umbraco 9 with Docker.
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Deploying Umbraco 9 to Azure App Service for Linux

- Umbraco
Learn how to create the Azure infrastructure using the Azure CLI to host an Umbraco 9 website using Azure SQL and Azure App Service for Linux, and how to deploy your Umbraco 9 site.
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Handle No-Answer Scenarios with Voicemail and Callback

- .NET
With Twilio Programmable Voice you can ask customers to leave a message and their phone number if there's nobody available to take the call so you can give them a callback later
.NET Bot on a scooter riding from Umbraco 8 to 9

Thoughts and tips on moving to Umbraco 9 from Umbraco 8

- Umbraco
.NET Core was a groundbreaking change to the .NET platform. It is blazing fast, open-source, and cross-platform across Windows, Linux, and macOS. With Umbraco 9, we finally get to enjoy all the new innovations from .NET Core. Read about my experience upgrading an Umbraco 8 website to Umbraco 9.
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Get Your Head Together With Blazor’s New HeadContent and PageTitle

- .NET
Let’s take a look at the three Blazor components .NET 6 is introducing to help you manage the head of your document—PageTitle, HeadContent, and HeadOutlet.
.NET bot writing on whitebpard

Generic Linear Search/Sequential Search for a sequence in C# .NET

- .NET
To practice algorithms and data structures, I reimplemented Linear Search/Sequential Search for a sequence using C#'s generic type parameters.
.NET bot writing on whitebpard

Generic Boyer–Moore–Horspool algorithm in C# .NET

- .NET
To practice algorithms and data structures, I reimplemented Boyer–Moore–Horspool algorithm for a sequence using C#'s generic type parameters.
.NET bot writing on whitebpard

Generic Binary Search in C# .NET

- .NET
To practice algorithms and data structures, I reimplemented binary search using C#'s generic type parameters.
.NET bot writing on whitebpard

Generic Insertion Sort in C# .NET

- .NET
To practice algorithms and data structures, I reimplemented insertion sort using C#'s generic type parameters.
.NET bot writing on whitebpard

Generic Quick Sort in C# .NET

- .NET
To practice algorithms and data structures, I reimplemented Quick Sort using C#'s generic type parameters.
.NET bot writing on whitebpard

Generic Merge Sort in C# .NET

- .NET
To practice algorithms and data structures, I reimplemented merge sort using C#'s generic type parameters.
.NET bot writing on whitebpard

Generic Bubble Sort in C# .NET

- .NET
To practice algorithms and data structures, I reimplemented bubble sort using C#'s generic type parameters.
.NET Bot, Azure, and Discord are together in a Discord server

How to create a Discord Bot using the .NET worker template and host it on Azure Container Instances

- Azure
Learn how to develop a Discord bot using the .NET worker template, containerize it using Docker, push the container image to Azure Container Registry, and host it on Azure Container Instances.
Picture of Niels—white male with long blond hair— with a shocked expression

Guest on .NET Docs Show: Making Phone Calls 📞 from Blazor WebAssembly with Twilio Voice

- .NET
Earlier this week, the folks at the .NET Docs Show invited me over to talk about Twilio, .NET, and Blazor WebAssembly. We discussed different architectures, workflow diagrams, Twilio capabilities, and how to integrate them using ASP.NET WebAPI's and Blazor WebAssembly.
.NET Bot surfing a wave

How to bypass Captchas in Selenium UI tests

- .NET
Captchas are often used as a way to combat spam on website forms. Unfortunately, this also makes it harder to verify the functionality of the forms using UI tests like Selenium. To work around this you can extend your website with a bypass form.
.NET Bot holding a letter

Capture emails during development using smtp4dev and UI Test with Selenium

- .NET
You can use smtp4dev during development to prevent emails from going out to real customers. This tool also supports IMAP which you can use to query emails for automated testing.
.NET Bot holding a package with "ZIP" on it.

Create ZIP files on HTTP request without intermediate files using ASP.NET MVC Framework

- .NET
The ZipArchive wraps any stream to read, create, and update ZIP archives. You can send the result to the client using ASP.NET MVC Framework.
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How to deploy Blazor WebAssembly to DigitalOcean App Platform

- .NET
Blazor WebAssembly can be served as static files. These files can be hosted in static hosting services such as DigitalOcean App Platform.
.NET Bot dressed up as a doctor

Don't use HttpContext.Current, especially when using async

- .NET
Avoid using HttpContext.Current if possible, especially in asynchronous code. Use the properties provided on the Page or Controller instead and pass them on to the asynchronous code.
.NET Bot holding a package with "ZIP" on it.

Create ZIP files on HTTP request without intermediate files using ASP.NET Core MVC, Razor Pages, and endpoints

- .NET
The ZipArchive wraps any stream to read, create, and update ZIP archives. You can send the result to the client using ASP.NET MVC, Razor Pages, and endpoints.
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How to deploy Blazor WebAssembly to Cloudflare Pages

- .NET
Blazor WebAssembly can be served as static files. These files can be hosted in static hosting services such as Cloudflare Pages.
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Download the right ChromeDriver version & keep it up to date on Windows/Linux/macOS using C# .NET

- .NET
Chrome frequently updates automatically causing ChromeDriver versions to mismatch. Using C# .NET you can download the correct version of the ChromeDriver and keep it up-to-date.
An illustration of a lock and a key. The key handle is in the shape of the Twilio logo.

Better Authentication with Twilio API Keys

- .NET
API Keys are now the preferred way to authenticate with Twilio's API. You can create as many API Keys as you need and remove them if they are compromised or no longer used.
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How to deploy Blazor WebAssembly to Heroku

- .NET
Heroku doesn't officially offer a static hosting service but does have an experimental 'buildpack' which gives you static hosting capabilities you can use to deploy and host Blazor WebAssembly.
Blazor logo pointing to the GitHub logo pointing to the AWS Amplify logo.

How to deploy Blazor WebAssembly to AWS Amplify

- .NET
Blazor WebAssembly can be served as static files. These files can be hosted in static hosting services such as AWS Amplify.
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Download the right ChromeDriver version & keep it up to date on Windows/Linux/macOS using PowerShell

- PowerShell
Chrome frequently updates automatically causing ChromeDriver versions to mismatch. Using PowerShell you can download the correct version of the ChromeDriver and keep it up-to-date.
.NET Bot building an application

Use project Tye to host Blazor WASM and ASP.NET Web API on a single origin to avoid CORS

- .NET
Using Microsoft's experimental Project Tye, you configured the proxy to forward requests to '/api' to the Web API, and all other requests to the Blazor WASM client.
Blazor logo pointing to the GitHub logo and the GitHub logo pointing to the Netlify logo.

How to deploy Blazor WebAssembly to Netlify

- .NET
Now that you can run .NET web applications without server-side code, you can deploy these applications to various static site hosts, such as Netlify.
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Run Custom Availability Tests using PowerShell and Azure Application Insights, even on-premises

- Azure
The built-in availability tests in Azure Application Insights are great but very basic. You can create your own custom availability test. Learn how to create a custom availability test using PowerShell and Application Insight's .NET SDK.
.NET Bot building an application

Use YARP to host client and API server on a single origin to avoid CORS

- .NET
Using Microsoft's new reverse proxy "YARP", you configured the proxy to forward requests to '/api' to the Web API, and all other requests to the Blazor WASM client.
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Video: How to deploy Blazor WebAssembly to Firebase Hosting

- .NET
With ASP.NET Blazor WebAssembly you can create .NET applications that run completely inside of the browser. The output of a Blazor WASM project are all static files. You can deploy these applications to various static site hosts like Firebase Hosting.
.gz on a blue background

Introducing Online GZIP de/compressor, built with Blazor WebAssembly

- .NET
Using Blazor WASM and the GZIP API's I created this little web application which you can use to compress and decompress multiple files using GZIP.
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Pre-render Blazor WebAssembly at build time to optimize for search engines

- .NET
Using pre-rendering tools like react-snap, you can pre-render Blazor WASM. Additionally, you can integrate these pre-rendering tools inside of your continuous integration and continuous deployment pipelines.
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Fix Blazor WebAssembly PWA integrity checks

- .NET
The service-worker-assets.js file is generated during publish and any modification made to the listed files after publish will cause the integrity check to fail.
 Blazor logo next to an arrow pointing to the GitHub logo next to a double arrow pointing from the GitHub logo to the Firebase Hosting logo

How to deploy Blazor WebAssembly to Firebase Hosting

- .NET
With ASP.NET Blazor WebAssembly you can create .NET applications that run completely inside of the browser. The output of a Blazor WASM project are all static files. You can deploy these applications to various static site hosts like Firebase Hosting.
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Video: How to deploy ASP.NET Blazor WebAssembly to GitHub Pages

- .NET
With ASP.NET Blazor WebAssembly you can create .NET applications that run completely inside of the browser. The output of a Blazor WASM project are all static files. You can deploy these applications to various static site hosts like GitHub Pages.
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Interacting with JavaScript Objects using the new IJSObjectReference in Blazor

- .NET
A new type is introduced in .NET 5 called IJSObjectReference. This type holds a reference to a JavaScript object and can be used to invoke functions available on that JavaScript object.
.NET Bot

Harden Anti-Forgery Tokens with IAntiforgeryAdditionalDataProvider in ASP.NET Core

- .NET
Using IAntiforgeryAdditionalDataProvider you can harden ASP.NET Core's anti-forgery token feature by adding additional data and validating the additional data.
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Rethrowing your exceptions wrong in .NET could erase your stacktrace

- .NET
You may be erasing your stacktrace if you are catching and rethrowing exceptions the wrong way. This could make debugging a nightmare because you don't know where the exception was originally thrown.
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Making Phone Calls from Blazor WebAssembly with Twilio Voice

- .NET
Using Twilio Voice you can add the ability to make and receive phone calls from your own ASP.NET web applications. Twilio’s helper library for JavaScript makes it easy to integrate client functionality into web front ends built with Blazor WebAssembly, and the Twilio NuGet packages provide you with convenient interfaces to Twilio’s APIs for server-side tasks.
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ConvertFrom-SecureString : A parameter cannot be found that matches parameter name 'AsPlainText'

- PowerShell
If you're using older versions of PowerShell, you do not have the 'AsPlainText' flag available to you. You're not out of luck though, you can quickly create your own function which will give you the same result.
Blazor logo next to JavaScript logo

Communicating between .NET and JavaScript in Blazor with in-browser samples

- .NET
The success of Blazor relies heavily upon how well it can integrate with the existing rich JavaScript ecosystem. The way Blazor allows you to integrate, is by enabling you to call JavaScript functions from Blazor and .NET functions from JavaScript also referred to as 'JavaScript interoperability'.
.NET Bot writing on a whiteboard

Configure CORS using AppSettings or Custom Configuration Sections in ASP.NET Web API

- .NET
Microsoft's CORS library works, but the attributes force you to hardcode the CORS headers. By creating custom CORS attributes, you can read the CORS configuration from AppSettings or a custom config section.
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Configure ServicePointManager.SecurityProtocol through AppSettings

- .NET
Usually .NET automatically finds a security protocol in common, but sometimes you have to update ServicePointManager.SecurityProtocol explicitly.
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Real-time applications with Blazor Server and Firestore

- DotNet
Blazor Server is built on SignalR, which is built on websockets. Among things, websockets enable Blazor Server to push changes from the server to the browser at any time. You can build real-time UI's when you combine this with a real-time database.
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Pushing UI changes from Blazor Server to browser on server raised events

- .NET
Blazor Server is built on SignalR, and SignalR is built on websockets among other techniques. The combination of these technologies allow Blazor Server to push UI changes into the client without the client requesting those changes.
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Changing Serilog Minimum level without application restart on .NET Framework and Core

- .NET
There are many ways to configure Serilog. The configuration library has the additional advantage that it supports dynamic reloading of the MinimumLevel and LevelSwitches.
.NET Bot writing on a whiteboard

Using ConfigurationProviders from Microsoft.Extensions.Configuration on .NET Framework

- .NET
.NET Core introduced new API's. Some of those libraries are built to support multiple .NET platforms including .NET Framework. So, if you're still using .NET Framework, you could also take advantage of these new libraries.
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Introducing Umbraco's KeepAlive Ping configuration

- Umbraco
Umbraco 8.6 introduces the new keepAlive configuration inside of `umbracoSettings.config` which allows you to change "keepAlivePingUrl" and "disableKeepAliveTask"
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Capturing ASP.NET Framework RawUrl with Azure Application Insights

- Azure
By default, Application Insights will capture a lot of data about your ASP.NET applications including HTTP Requests made to your website. Unfortunately, the URL captured by Application Insights doesn't always match the URL originally requested by the client.
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Capturing ASP.NET Core original URL with Azure Application Insights

- Azure
By default, Application Insights will capture a lot of data about your ASP.NET applications including HTTP Requests made to your website. Unfortunately, the URL captured by Application Insights doesn't always match the URL originally requested by the client.
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How to deploy ASP.NET Blazor WebAssembly to GitHub Pages

- .NET
With ASP.NET Blazor WebAssembly you can create .NET applications that run completely inside of the browser. The output of a Blazor WASM project are all static files. You can deploy these applications to various static site hosts like GitHub Pages.
How to deploy ASP.NET Blazor WebAssembly to Azure Static Web Apps. Blazor logo pointing to a GitHub logo pointing to an Azure logo.

How to deploy Blazor WASM & Azure Functions to Azure Static Web Apps using GitHub

- .NET
With ASP.NET Blazor WebAssembly you can create .NET applications that run inside of the browser . The output of a Blazor WASM project are all static files. You can deploy these applications to static site hosts, such as Azure Static Web Apps and GitHub Pages.
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How to run code after Blazor component has rendered

- .NET
Blazor components render their template whenever state has changed and sometimes you need to invoke some code after rendering has completed. This blog post will show you how to run code after your Blazor component has rendered, on every render or as needed.
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Checking out NDepend: a static code analysis tool for .NET

- .NET
NDepend is a static code analysis tool (SAST) for .NET. NDepend will analyze your code for code smells, best practices, complexity, dead code, naming conventions, and much more.
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How to add Hangfire to DNN

- .NET
DNN already has an excellent built-in scheduler you can use to schedule tasks. But you may be more familiar with and prefer Hangfire for running background jobs. These instruction will walk you through configuring Hangfire in with DNN.
Screenshot of NCrontab Expression Tester tool

Introducing NCrontab Tester (Blazor WebAssembly)

- .NET
Introducing NCrontab Expression tester, made using NCrontab .NET library, Blazor WebAssembly, and hosted on Azure Static Web Apps
.NET

Download .NET Windows Theme based on the new .NET Brand GitHub repo

- .NET
The .NET GitHub org has a new Brand repository containing a detailed Brand guidelines PDF, logo's, illustrations, and wallpapers. Using these resources I put together a Windows Theme for .NET which you can download here!
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Use PowerShell to communicate with Dynamics CRM using the .NET XRM SDK

- Dynamics
If you've developed client applications or plugins for Dynamics CRM before, you are familiar with the CRM/XRM DLL's. You may have gotten those DLL's from the CRM installation, the SDK zip, or the NuGet package. Another way to interact with the CRM DLL's is through PowerShell. PowerShell is built upon .NET meaning you can call exactly the same CRM libraries from PowerShell as from .NET applications.
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PowerShell snippet: Get optionset value/labels from Dynamics CRM Entity/Attribute

- Dynamics
Instead of having to use the CRM interface to copy all the labels and values manually, you can save yourself a lot of time using this PowerShell script. Using the following script file named "GetOptionSet.ps1", you can list all the value/label pairs for a given Entity + OptionSet-Attribute:
.NET Core logo + Dotnet bot wearing Red Hat

How to run ASP.NET Core Web Application as a service on Linux without reverse proxy, no NGINX or Apache

- .NET
This article walks us through running a ASP.NET Core web application on Linux (RHEL) using systemd. The end goal is to serve ASP.NET Core directly via the built-in Kestrel webserver over port 80/443.
.NET Core logo + Dotnet bot wearing Red Hat

How to run a .NET Core console app as a service using Systemd on Linux (RHEL)

- .NET
Let's learn how to run a .NET Core console application on systemd. After running a console app as a service, we'll upgrade to using the dotnet core worker service template designed for long running services/daemons. Lastly, we'll add the systemd package integration.
Phone/Tablet/Laptop displaying Umbraco logo

Implementing Responsive Images in Umbraco

- Umbraco
The web platform has responsive image capabilities such as the srcset-attribute, sizes-attribute, and the picture-element. These capabilities may seem daunting sometimes. We'll learn how to make them available and maintainable to Umbraco content editors.
Visual Studio Code logo cursing at .NET Core logo with Red Hat logo

VS Code C# Extension not working in Remote SSH mode on Red Hat Linux? Here's a workaround

- .NET
Unfortunately, the C# Extension for VS Code malfunctions when following the official steps to install .NET Core on Red Hat and using the Remote SSH extension. OmniSharp is not able to find the .NET Core installation but we can work around this.
Screenshot of Visual Studio with EF Raw SQL Code

Querying data using raw SQL & Stored Procedures in Entity Framework Core

- .NET
When LINQ queries can't meet the performance requirements of your application, you can leverage Raw SQL and still have EF map the data to concrete .NET objects. You can also invoke Stored Procedures in case the logic of the SQL queries need to reside in the SQL Database.
Screenshot of the HTML Agility Pack homepage

Auto generate Heading Anchors using HTML AgilityPack DOM Manipulation

- .NET
Manually adding an anchor to every heading would be a painful solution. So let's learn how we can achieve this by generating the Heading Anchors using the HTML AgilityPack .NET library.
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How to run .NET Core Selenium UI tests on Azure DevOps Pipelines Windows/Ubuntu agents? 🚀

- .NET
his post discusses how to take those UI tests and run them in Azure DevOps Pipelines on both Windows & Ubuntu agents. Use this GitHub repository which contains the UI test project necessary to follow along in this post.
.NET Core + Selenium logo steering a web browser window

How to UI test using Selenium and .NET Core on Windows, Ubuntu, and MacOS

- .NET
Selenium is a browser 🌐 automation tool mainly used for UI testing and automating tasks. Selenium is agnostic of operating system, programming language, and browser. You can automate Chrome on MacOS using C#, FireFox using Python on Windows, or Opera using NodeJS on Linux to give you a few examples.
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Creating a Discord Bot using .NET Core and hosting it on Azure App Services

- Azure
Discord is an online communication platform built specifically for gaming. Using .NET Core and Azure App Service WebJobs we can host a Discord bot that can listen and respond to voice and text input.
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PowerShell Snippet: Crawling a sitemap

- PowerShell
Here's a PowerShell function that you can use to validate that all pages in your sitemap return a HTTP Status code 200. You can also use it to warm up your website, or ensure your website caching is warm after a cold boot. I personally use it as part of my Continuous Delivery pipeline to warm up my site and Cloudflare's cache.
Robot with Umbraco logo

Crawling through Umbraco with Robots

- Umbraco
The robots.txt file’s main purpose is to tell robots (Google Bot, Bing Bot, etc.) what to index for their search engine, and also what not to. Usually you want most of your website crawled by Google, such as blog posts, product pages, etc., but most websites will have some pages/sections that shouldn’t be indexed or listed in search engines.
Azure Application Insights logo + Umbraco logo

Ignoring Umbraco ping.aspx from Azure Application Insights

- Umbraco
Application Performance Monitors provide you with a lot of data, but some of that data may not be relevant. Specifically, in Umbraco there is a page at \umbraco\ping.aspx that is being called frequently to keep the site alive. This is very useful to prevent the site from "dying" (?), but the data for this request isn't that relevant and could skew your statistics. Using Azure Application Insights ITelemetryProcessor, we can prevent ping request from being sent to Azure Application Insights.
Spider Web with Umbraco logo

Crawling through Umbraco with Sitemaps

- Umbraco
Websites come in all shapes and sizes. Some are fast, some are beautiful, and some are a complete mess. Whether it's a high-quality site is irrelevant if people can’t find it, but search engines are here to help. Though the competition to get on first page is tough, this series will dive into some common practices to make your website crawlable.