.NET

Abstraction versus encapsulation in C#

Separates hiding implementation complexity from controlling access to state, with practical examples where both ideas work together.

Access modifiers and assembly boundaries in C#

Uses public, internal, protected, private, and protected internal deliberately to control API surface and inheritance exposure.

ActionResult vs typed results in ASP.NET Core APIs

Compare controller ActionResult patterns with minimal API typed results and explicit HTTP outcomes.

Add a regression test after a role-specific incident

Turns a production-only role and payload failure into the smallest durable API regression test.

Add guardrails around EF Core tenant query filters

Explains how tenant query filters help, where they can be bypassed, and what extra safeguards protect tenant isolation.

ADO.NET connection pooling and pool exhaustion

Explains physical connection reuse, pool partitioning, short ownership, exhaustion causes, diagnostics, and why increasing the pool is not the first fix.

.NET Full Stack

Full-cycle .NET full-stack interview preparation.

A role-based preparation path covering C#, ASP.NET Core APIs, data access, frontend integration, testing, deployment, system design, real-life scenarios, and behavioral interview topics.

.NET Backend