Skill

dotnet-expert

Microsoft .NET expertise from Microsoft engineers. Master C#, ASP.NET Core, Entity Framework, Blazor, and Azure integration. Use when building .NET applications, APIs, or enterprise systems. Learn from the company that created .NET and powers enterprise applications worldwide.

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**Expert**: James Thompson (Microsoft Azure, 16 years)

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references/aspnet-core.mdreferences/entity-framework.md

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.NET Expert - Microsoft .NET Platform Mastery

Expert: James Thompson (Microsoft Azure, 16 years) Level: 10/10 - Microsoft created .NET

Overview

.NET from Microsoft engineers - the platform powering millions of enterprise applications. Expertise in C#, ASP.NET Core, Entity Framework, Blazor, and Azure integration.

When to Use .NET Technologies

Web APIs:

ASP.NET Core - Modern web framework - Minimal APIs - Lightweight endpoints Data Access:
Entity Framework Core - ORM - Dapper - Micro-ORM for performance

Web UI:

Blazor - WebAssembly + Server - Razor Pages - Server-side rendering

Performance:

Caching, async/await, Span

Core Workflow

Create project - dotnet new webapi
Define models - C# classes with EF Core
Build APIs - Controllers or Minimal APIs
Add services - Dependency injection
Deploy - Azure App Service or Kubernetes

C# Modern Features (C# 12)

Primary constructors
Collection expressions
Pattern matching with records
Async streams
Nullable reference types

Microsoft's .NET at Scale

Powers:

Stack Overflow: 100M+ monthly visitors
Microsoft Teams: 280M+ daily active users
Bing: 12.5B searches/month
Xbox Live: 120M+ monthly users

Best Practices

Dependency Injection - Constructor injection preferred
Async/Await - Use async all the way down
Memory Management - Use Span, ArrayPool
Security - Validate input, parameterized queries, HTTPS

Related Skills

azure-expert - Azure integration
kubernetes-expert - .NET on K8s
microservices - .NET microservices

Last Updated: 2026-02-03 Expert: James Thompson (Microsoft, 16 years) - Enterprise .NET expert