C# and .NET by Nick Cosentino

Dev Leader: C# and .NET
Software Engineering Content

Practical, in-depth content for software engineers and technical leaders. Learn C#, .NET, software architecture, AI-assisted development, and engineering leadership with guidance you can apply on your team today.

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C# Event Subscriptions: Identity, Unsubscription, and Lifetime

C#event subscriptions unsubscribe delegates lifetime

Understand C# event subscriptions with complete examples for handler identity, duplicate removal, retained wrappers, owned lifetime, and dispatch snapshots.

Nov 8, 20269 minute read

MongoDB Indexes in C#: Query Shapes and Explain Evidence

MongoDB Indexes C#Explain Query Plans

Understand MongoDB indexes in C# through query shapes, compound key order, write maintenance, and explain evidence without inventing performance guarantees.

Nov 8, 20269 minute read

Safe Refactoring in C#: A Workflow for Behavior-Preserving Changes

safe refactoring C#behavior preservation characterization tests

Learn safe refactoring in C# with a worked workflow for recording behavior, making small changes, reviewing semantic differences, and preserving API contracts.

Nov 7, 20269 minute read

Composition in C#: Owning Versus Borrowing Dependencies

C#composition dependency injection IDisposable ownership

Learn composition in C# through dependency ownership, shared references, and disposal boundaries, including why borrowers should not dispose injected services.

Nov 7, 202610 minute read