From the field

My articles on agentic coding, AI adoption, .NET and identity. Honest about what works, what does not, and why adoption is usually the real problem. Dutch-only pieces appear here in Dutch.

Signpost pointing away from a crossed-out IdentityServer4 toward Duende IdentityServer, OpenIddict and Azure Entra ID
Identity & SSO March 11, 2026 · 6 min

Replacing IdentityServer4 in .NET: Duende, OpenIddict or Azure Entra ID

IdentityServer4 is end of life. Compare Duende IdentityServer, OpenIddict and Azure Entra ID and migrate your .NET token service safely.
Diagram of SCIM automated provisioning between an identity provider (Azure Entra ID, Auth0) and a SaaS application
Identity & SSO March 4, 2026 · 9 min

SCIM Provisioning in .NET: Automate Enterprise Onboarding

Build SCIM 2.0 provisioning endpoints in ASP.NET Core so Azure Entra ID and Auth0 automate user account creation. No more manual enterprise onboarding.
Scale weighing WorkOS, Keycloak and Auth0 against custom .NET on cost, lock-in and data sovereignty
Identity & SSO February 25, 2026 · 4 min

WorkOS, Keycloak or custom .NET? Choosing SSO for your SaaS

WorkOS charges $125 per connection per month. Compare WorkOS, Keycloak, Auth0 and custom .NET on cost, lock-in and data sovereignty.
Chaïm Zonnenberg
Chaïm Zonnenberg
.NET Developer | Agentic Coding & Identity/SSO

Questions, or need help in your own .NET team? Feel free to send me a message.

Get in touch