The Testing Pyramid Explained for C# Developers: Unit, Integration and Manual (with a Real Run)

Test-Driven Development in C#: Red, Green, Refactor (on a Real Value Object)

Unit-Testing C# Value Objects: Asserting Result Without Exceptions

Testing Railway-Oriented Pipelines in C#: Short-Circuit vs Accumulate

Property-Based Testing in C# with CsCheck: Prove Your Value Objects Are Total

Testing DDD Aggregates in C#: Invariants as Failures and Asserting Domain Events

Kill Flaky Tests in C#: Freeze Time, Seam Identity, Build Clean Data

Integration Testing ASP.NET Core with WebApplicationFactory: POST then GET, In-Memory

Testing HTTP in C#: Problem Details (RFC 9457), Status Codes, ETags and Snapshot Tests

Testing Authorization in C#: RBAC, ABAC, and 403 vs 404 (Hide Existence)

Testing Observability in C#: Assert Spans, the SLI Metric and SLOs (OpenTelemetry)

Testing Data for Real in C#: USE_REAL_SERVICES, Testcontainers (Postgres) and the Outbox

Consumer-Driven Contract Testing in C# with PactNet: Stop Breaking Your Consumers

Write and Test a Custom Roslyn Analyzer in C#: Enforce Your Own Architecture Rules

Mutation Testing in C# with Stryker.NET: Why 100% Coverage Lies (and Testing AI's Tests)

EF Core vs SQL Project: Catch Database Schema Drift in CI (No Database Required)