Articles tagged aspnetcore
How to Secure User Data in Azure Cosmos DB
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. Cosmos DB is a cloud database product from Microsoft that offers scalable and high-performance services. The core product runs on a proprietary NoSQL database...
Secure Your .NET 6 Web API
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. .NET 6 is here and many of us are making preparations to update .NET 5 codebases to .NET 6. As part of this review,...
Managing Multiple .NET Microservices with API Federation
For large enterprise companies, boundaries around each team are crucial for maintaining systems that are owned by software engineers. This is accomplished by allowing individual teams to own their systems and expose them via APIs. You also need to keep certain types of cross-cutting concerns centralized, like select security controls, logging, and routing. If you don’t, every API across different teams has to implement common controls like rate-limiting, logging, and authentication. This can lead to...
Comparison of Dependency Injection in .NET
Why you should care about dependency injection Dependency injection is a tried and proven design pattern for producing code that is testable, readable, and reusable. This is achieved by creating (or increasing) a separation of concerns, where each class has a dedicated area of responsibility. Dependency injection is just one design pattern used to achieve inversion of control in which the calling code, or client, has no knowledge of the inner workings of the dependency,...
Using Azure Cognitive Services in a .NET App
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. Azure Cognitive Services is a collection of cloud-based AI products from Microsoft Azure to add cognitive intelligence into your applications quickly. With Azure Cognitive...
Secure Your .NET 5 Blazor Server App with MFA
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. Introduction to Server Blazor apps Blazor is an exciting new technology from Microsoft that will allow developers to bring C# to clients. Server and...
How to Write Cleaner, Safer Code with SonarQube, Docker and .NET Core
When it comes to code quality and code security, SonarQube is your teammate! This analysis tool is pretty straightforward to use, especially with some help from Docker. In this post, I’ll show you how to run a Docker container with SonarQube to analyze the code of a simple ASP.NET Core 3.0 application. Code analysis is a critical component of app development because it can identify security issues and other tricky bugs that might be overlooked...
Web Forms Migration to Blazor in .NET Core
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. ASP.NET Web Forms framework has been the cornerstone technology of .Net for web development since the release of .Net Framework in 2002. ASP.NET Web...
How to Toggle Functionality in C# with Feature Flags
Toggling functionality using feature flags in .NET Core apps is quite straightforward, especially with a neat little feature flag management service. In this post, I’ll walk you through how to build a simple web application using Okta for user authentication and how to use ConfigCat to manage and access feature flags. What Are Feature Flags? Feature flags (aka. feature toggles) are a relatively new software development technique that enables development teams to turn features on...
A Quick Guide to Elasticsearch for .NET
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. Implementing search functionality in your .NET Core apps doesn’t have to be hard! Using Elasticsearch makes it easy to develop fast, searchable apps. In...
Update App Secrets with Jenkins CI and .NET Core
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. Introduction Jenkins is a free and open-source application that makes it easy to create CI/CD pipelines in almost any language or environment. Jenkins features...
Developer's Cheat Sheet for C# 9.0
Introduction to C# 9 (and a bit of C# 8, too) Let’s start with a background on how C# 9 got here (implementation examples start in the next section). The last few years in computer science, we’ve observed the rising popularity of the #FreeLunchOver concept. The idea is that CPU technology, based on electrical signals and Von Neumann architecture, has reached its intrinsic limits. As long as integrated circuits were slower than light, we knew...
How to Write Secure SQL Common Table Expressions
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. Common table expressions are a powerful feature of Microsoft SQL Server. They allow you to store a temporary result and execute a statement afterward...
How to Use WebAuthn in C#
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. Nowadays, using a password for authentication is becoming less and less secure. Password attacks are becoming more sophisticated, and data breaches occur more frequently....
How to Support .NET Core SameSite + OAuth Apps on Linux
Google’s recent approach to SameSite cookie attributes caused a bit of confusion among developers. Especially in cases where handling redirects is necessary. After doing some research in the topic I’d like this article to be a guide on how to handle SameSite cookie attributes properly in production. This guide can serve as the basis for deploying an application to any Linux based environment—such as AWS Elastic Beanstalk, Google Cloud App Engine—or any VPS Linux deployment....
How to Deploy Your .NET Core App to Google Cloud, AWS or Azure
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. There has been a cut-throat competition between cloud hosts in the past few years - each attempting to earn the sympathy of developers and...
Rider for C# - The Best Visual Studio Alternative IDE
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. When it comes to developing .NET apps, Visual Studio has historically been the default choice for .NET developers for two main reasons: Visual Studio...
Install .NET Core Apps on Linux in 5 Minutes
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. As a big fan of open source, I’m loving the fact that .NET Core is cross-platform. It opens up endless possibilities, from hobby projects,...
How to Authenticate with SAML in ASP.NET Core and C#
Security Assertion Markup Language, more commonly known as SAML, is an open standard for exchanging authentication and authorization data between parties. Most commonly these parties are an Identity Provider and a Service Provider. The primary use case for SAML has typically been to provide single sign-on (SSO) for users to applications within an enterprise/workforce environment. Up until the past few years, SAML was considered the industry standard—and proven workhorse—for passing an authenticated user into applications...
Deploy a .NET Container with Azure DevOps
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. When I began programming (in the ’80s), computers weren’t equipped with a network card by default. The internet was almost unknown and modems were...
How to Build Securely with Blazor WebAssembly (WASM)
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. Last month I came out with a video tutorial on Blazor WebAssembly and I thought it would be good to follow up with a...
How to Adapt Your .NET App for SameSite
Have you run across an error message vaguely referencing SameSite in your .NET Apps? Read on, it’s time for a change to your code - and I’ll explain why. I like cookies, both the custard stuffed and the dry ones (which I use to dunk in my coffee or tea). This post is very much about cookies - only not the delicious, culinary ones. As in many other cases (think of the web, for example),...
Migrate Your ASP.NET Framework to ASP.NET Core with Okta
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. Ah, migration! Let’s say you have an ASP.NET application that has been running fine for years. You have kept up with the various .NET...
How to Make a CRUD App with Entity Framework Core
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. ASP.NET Core is Microsoft’s latest iteration of its web framework, which boasts many upgrades over the .Net Framework versions of ASP.NET. ASP.NET Core is...
ASP.NET Core 3.0 MVC Secure Authentication
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. On September 23rd, Microsoft announced the third major release of its .NET Core framework. This new release boasts better performance, support for Windows Desktop...
Build a Simple CRUD App with ASP.NET Core, MySQL, and Twilio
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. In this article, we’ll be building an MVC task management form with .NET Core 2.2. We’ll also be showing how to integrate with a...
IInterface Considered Harmful
Developers have been lauded as being early adopters when it comes to technology products, but they seem to be late bloomers when it comes to dropping old habits. It took years of convincing and some guidance from Microsoft to get .NET developers to stop using Hungarian Notation in their programs, but there’s is one last “comfort blanket” it left: developers still use the “I” prefix for interfaces. I want it to stop. Let it go....
Build a CRUD App with ASP.NET Core 2.2 and SQL Server
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. I’ve always said that you can tell a lot about a person by the kind of music they listen to. Don’t tell me you...
Build a GraphQL API with ASP.NET Core
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. “There is no Frigate like a Book To take us Lands away…” – Emily Dickinson These days, people read more on social media than...
Build a REST API with ASP.NET Core 2.2
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. ASP.NET Core is entirely open source, free, has built-in DI and logging, works smoothly with a fantastic ORM and has tons of built-in features...
Build a CRUD App with ASP.NET Core 2.2 and Entity Framework Core
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. If you’re like me, you love music. Music is always streaming somewhere in my house at all times. I especially like going to see...
Build a CRUD App with ASP.NET Core and TypeScript
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. There are a lot of things for .NET developers to love about TypeScript. It has strong typing that .NET Developers are used to and...
Build Secure Microservices with AWS Lambda and ASP.NET Core
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. Microservices are fun to build and offer us a scalable path to overcoming problems with tightly coupled dependencies that plague monolithic applications. This post...
Create Login and Registration in Your ASP.NET Core MVC App
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. User authentication and authorization are common features in web applications, but building these mechanics has the potential to take a lot of time. Doing...
Go for liftoff at Okta!
T-minus 3… 2… 1… I’m blasting my way into the Developer Relations world like Alice discovering Wonderland and its fantastic cast of characters. I am so curious, and excited, and all of the feels that come with coming to Okta! Officially stepping into the Developer Avocado (er… pardon me, Advocate) role and bringing the love of .NET, voice and IOT to the party. Who is this Lady Nerd? Well, for starters I am obsessed with...
Navigating the ASP.NET Core Identity Landscape
These days, users of web application expect a personalized, secure experience. They want to make sure that they can easily get to their own information, and that no one else can access it. Developers of these web applications want a simple way to manage users and be assured that they have secured their users’ information from prying eyes. For developers of web applications written in ASP.NET Core, there are several choices for managing user identities....
Add Login to Your ASP.NET Core MVC App
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. One of the improvements in the latest version of ASP.NET Core (MVC ) is a new and simplified authentication integration. However, managing authentication on...
Build a Simple CRUD App with ASP.NET Core and Vue
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. Keeping an eye on your daily calorie intake can be crucial to healthy lifestyle. There are a ton of apps on the market that...
Deploy Your ASP.NET Core Application to Azure
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. One of the scariest features of Visual Studio is without a doubt right-click to publish. There are very few instances in which you’d actually...
Build a CRUD App with ASP.NET Core and Angular
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. A lot of applications today are built with an API on the backend, and then a single page application on the front end. This...
Token Authentication in ASP.NET Core 2.0 - A Complete Guide
Token authentication has been a popular topic for the past few years, especially as mobile and JavaScript apps have continued to gain mindshare. Widespread adoption of token-based standards like OAuth 2.0 and OpenID Connect have introduced even more developers to tokens, but the best practices aren’t always clear. I spend a lot of time in the ASP.NET Core world and have been working with the framework since the pre-1.0 days. ASP.NET Core 2.0 has great...
Build a Secure To-Do App with Vue, ASP.NET Core, and Okta
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. I love lists. I keep everything I need to do (too many things, usually) in a big to-do list, and the list helps keep...
User Authorization in ASP.NET Core with Okta
Note: In May 2025, the Okta Integrator Free Plan replaced Okta Developer Edition Accounts, and the Okta CLI was deprecated. We preserved this post for reference, but the instructions no longer work exactly as written. Replace the Okta CLI commands by manually configuring Okta following the instructions in our Developer Documentation. Authorization is the oft-forgotten piece of identity and access management. The fact is, almost every app needs more than just “are they signed in?”...