I guess every .NET developer is familiar with the Path.Combine method. But, is every .NET developer using it correctly to ensure its result is cross-platform compatible? I guess no as I was one of these developers who didn't use it correctly. Did you ever see something like this? var arbitraryPath = Path.GetFullPath( Path.Combine( AppContext.BaseDirectory, @"..\..\..\..\ArbitraryDirectory" ) ); This works flawlessly on Windows.

The author migrated a .NET 10 test project from VSTest to Microsoft.Testing.Platform due to CI/CD pipeline failures after a NuGet package update. The post details the migration process, highlighting necessary changes in the Azure DevOps pipeline and .csproj file to resolve errors and achieve successful test runs in both Visual Studio and the Azure DevOps YAML pipeline.

The blog post details implementing Azure Function key retrieval and storage in a Key Vault secret using AzAPI provider, highlighting the configuration process and solution achieved.

In Azure DevOps organizations that are connected to Microsoft Entra, you may spot (duplicated) users with email prefixed with OIDCONFLICT_UpnReuse_{OID_HERE} (i.e. when trying to give them access or when mentioning them): Such users are neither visible in the Azure DevOps Web UI under Organization settings > General > Users nor when querying all users via graph or via the Azure DevOps CLI.

Multifactor authentication via SMS is vulnerable to bot attacks, potentially leading to high costs from automated account creations. To mitigate risks, it's recommended to disable SMS MFA, implement stronger bot protection, or disable sign-ups. If attacked, quickly identify and delete bot-created accounts using Azure portal and PowerShell scripts to manage user identities.

This blog post outlines the implementation of audit logging using Audit.NET in .NET Core applications with Entity Framework Core. It discusses the purpose of audit logs, which enhance traceability and compliance, and details the setup process, including modifying the DbContext, creating tracking properties, and configuring audit data storage in a dedicated entity.

Recently, I deployed a .NET Aspire solution to Azure Container Apps (via Azure Container registry). The Azure Container Apps resource is running within my personal Azure tenant. In my personal tenant, my user is assigned as Owner of the corresponding resource group and therefore also Owner (by inheritance) of the Container Apps Environment which resides within the same resource group. Furthermore, my user has Azure built-in role…

Switching Android smartphones complicates restoring Work or School account credentials, requiring re-signing into accounts and possibly resetting MFA.

This post show to implement a “Forgot your password” flow using the Swiss Digital identity and trust infrastructure, (swiyu) in an ASP.NET Core web application using ASP.NET Core Identi…

Secure Web application using ASP.NET Core, Angular, SonarQube and terraform. This repository hosts the source code for our .NET User Group Switzerland tour. - secure-web-apps/EndToEndSecurityWeb

Hello Berner .NET friends The e-ID was approved by a narrow majority in the referendum. Let's take this opportunity to look at security and the integration of e-ID into ou

This post shows how to authenticate users using Duende IdentityServer and ASP.NET Core Identity which verifies identities (verifiable digital credentials) using the Swiss Digital identity and trust…

On the 15th of September, 2025, Sonar finally released the long-awaited Software Composition Analysis (SCA) to SonarQube Advanced Security for SonarQube Cloud! Software Composition Analysis (SCA) is an ideally automated process that analyzes software codebases to identify or detect embedded open-source software/components. The identified/detected dependencies form the basis for the following features that SCA tools typically offer. Detection of known security vulnerabilities based on data from…

Configuring a custom domain for an Azure App Service including a App Service Managed Certificate is the kind of task where I constantly have to look up the details. For this reason, and because a colleague asked me to blog about it, I decided to briefly document the process here.

The author aimed to enable Defender for Storage on a dedicated storage account using Terraform, updating the existing configuration. Although the Terraform apply succeeded, the feature was not enabled. After research, the issue was resolved by adjusting user roles, allowing a subsequent Terraform apply to produce the desired outcome.

Hello Berner .NET friends The e-ID was approved by a narrow majority in the referendum. Let's take this opportunity to look at security and the integration of e-ID into ou

Hello Berner .NET friends The e-ID was approved by a narrow majority in the referendum. Let's take this opportunity to look at security and the integration of e-ID into ou

While preparing my session for DWX 2025, in which I demonstrated a simple use case for Azure DevOps MCP Server (creating a user story from within the IDE), I came up with some other interesting use cases for the daily work of a developer. Now that I have tested them, I will outline the use cases I have discovered in this blog post.

This blog post describes how to automate the upload of files to an Azure storage account using Terraform.

In my work as a software developer, I have already been involved in numerous existing .NET software projects. Nearly all of these existing code bases had at least one thing in common: application configuration was not obvious. But why? Especially in the .NET ecosystem everything required to make it obvious is there. In this blog post I share my personal best practice to counteract this situation.

While testing the local Azure DevOps MCP Server public preview, TF400813 error occurred due to wrongly selected default Azure subscription. Re-running az login to and selecting the correct subscription resolved the problem, allowing the server to function properly.

This blog post shows how an ASP.NET Core Identity application can integrate and implement multiple external identity providers. An OIDC client UI uses the solution and is implemented using Duende I…

This week, I tested Office 365 SMTP credentials using PowerShell. I created a script that defines sender and receiver email addresses, subject, and message, and sets up an SMTP client with secure credentials. The server is smtp.office365.com, using SSL on port 587 to send the email successfully.

At the heart of Aspire is a resource model. It defines the shape of your application — its services, dependencies, configuration, and how…

The content describes a process for creating a git tag in Azure DevOps after each production deployment, using the assembly version from a .NET project. It outlines a pipeline job that retrieves the version, formats it, then creates and pushes a git tag, requiring specific permissions for the build service user.

This post shows how to implement phone (SMS) verification and two-factor authentication (2FA) using ASP.NET Core Identity. The solution integrates phone-based verification and 2FA mechanisms. The i…

Introduction What Are Shortcuts in Microsoft Fabric? Authorization Why Use Shortcuts? Step-by-Step Guide: How to Create a Shortcut in Microsoft Fabric Prerequisites Conclusion Introduction Microsoft Fabric introduces a powerful feature called Shortcuts, enabling seamless access to data across different sources without duplication. Shortcuts make data more accessible, reduce storage costs, and streamline data engineering workflows. In this post, we will cover:

The author describes troubleshooting an Azure DevOps YAML pipeline error related to a local-exec provisioner in terraform, which failed to grant necessary permissions due to a missing Azure Active Directory Readers permission. They detail the root causes, error findings, and ultimately the adjustments made to resolve the issue, focusing on least privilege principles.

The author sought a method to identify inactive GitHub Copilot Business license users. After troubleshooting errors, they successfully implemented a reminder workflow and contributed improvements.

An application’s pentest revealed weak SSL/TLS cipher suites in Azure App Services. To enhance security, non-forward-secrecy cipher suites must be disabled. Utilizing Terraform and the azapi provider, a workaround was implemented to configure the Minimum TLS Cipher Suite, enforcing modern cryptographic standards.

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This post discusses restarting an Azure App Service in an Azure DevOps YAML pipeline after applying IaC config to update Azure Key Vault secrets during deployments.

Microsoft Entra ID (Azure AD) flows using ASP.NET Core and Microsoft.Identity.Web - damienbod/MicrosoftEntraIDAuthMicrosoftIdentityWeb

Last week I struggled (again) running ASP.NET Core integration tests for an ASP.NET Core Web API that uses DefaultAzureCredential in a Azure DevOps YAML pipeline. To avoid having to struggle again, I am writing down my findings here. The initial situation There was an existing ASP.NET Core (.NET 8) Web API project that uses DefaultAzureCredential to connect to an Azure Key Vault.

This week, I faced challenges deploying an ASP.NET Core Web API to an Azure App Service using GitHub Actions and OpenID Connect. Initial attempts with azure/webapps-deploy@v3 failed due to missing credentials. A later try with azure/cli@v2 failed because the deployment file wasn't a valid zip. Properly zipping the files led to successful deployment.