Dotnet Core Expert Skill

Name: Dotnet Core Expert
Author: 404kidwiz

404kidwiz/claude-supercode-skills

90 installs
404kidwiz/claude-supercode-skills

Build high-performance backend services and APIs using .NET Core and C#.

About

.NET Core and C# expertise for building enterprise backend services. Solo builders use this to architect .NET applications, design async APIs, and optimize performance.

.NET expertise
C# patterns
Performance optimization

Dotnet Core Expert by the numbers

90 all-time installs (skills.sh)
Ranked #82 of 155 .NET & C# skills by installs in the Skillselion catalog
Data as of Aug 11, 2026 (Skillselion catalog sync)

npx skills add https://github.com/404kidwiz/claude-supercode-skills --skill dotnet-core-expert

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Installs	90
Repository	404kidwiz/claude-supercode-skills ↗

What it does

Build high-performance backend services and APIs using .NET Core and C#.

Files

SKILL.mdMarkdownGitHub ↗

.NET Core Expert

Purpose

Provides expertise in cross-platform .NET development, including .NET MAUI for mobile/desktop, cross-platform console applications, and cloud-native .NET services. Covers .NET 8 features and cross-platform deployment.

When to Use

Building cross-platform .NET applications
Developing with .NET MAUI (mobile/desktop)
Creating cross-platform console tools
Deploying .NET to Linux containers
Building cloud-native .NET services
Cross-platform file and process handling
Using .NET Native AOT compilation

Quick Start

Invoke this skill when:

Building cross-platform .NET applications
Developing with .NET MAUI
Creating cross-platform console tools
Deploying .NET to Linux containers
Using .NET Native AOT compilation

Do NOT invoke when:

Windows-only WPF/WinForms (use windows-app-developer)
Legacy .NET Framework (use dotnet-framework-4.8-expert)
Web APIs specifically (use csharp-developer)
Azure infrastructure (use azure-infra-engineer)

Decision Framework

Cross-Platform UI:
├── Mobile + Desktop → .NET MAUI
├── Desktop only → Avalonia or MAUI
├── Web → Blazor
└── Console → Cross-platform console app

Deployment Target:
├── Linux containers → Self-contained, Alpine
├── Windows service → Worker service
├── macOS app → .NET MAUI or Avalonia
├── Single file → Publish single-file
└── Fast startup → Native AOT

Core Workflows

1. .NET MAUI App Setup

1. Create MAUI project from template 2. Configure target platforms 3. Set up MVVM architecture 4. Implement platform-specific code 5. Add handlers for native features 6. Configure app lifecycle 7. Test on each platform

2. Cross-Platform Deployment

1. Configure RuntimeIdentifiers 2. Choose self-contained or framework-dependent 3. Set up trimming if needed 4. Handle platform-specific paths 5. Package for each platform 6. Test on target OS

3. Native AOT Compilation

1. Enable PublishAot in project 2. Review AOT compatibility 3. Handle reflection limitations 4. Test trimmed application 5. Verify startup performance 6. Deploy optimized binary

Best Practices

Use Path.Combine for cross-platform paths
Check RuntimeInformation.IsOSPlatform
Use conditional compilation sparingly
Test on all target platforms
Use cross-platform abstractions
Handle line endings properly

Anti-Patterns

Anti-Pattern	Problem	Correct Approach
Windows paths	Breaks on Linux/Mac	Use Path.Combine
P/Invoke everywhere	Platform-specific	Use cross-platform APIs
Ignoring case sensitivity	Fails on Linux	Consistent casing
Untested on targets	Runtime failures	CI for each platform
Heavy reflection with AOT	Trimming breaks app	Use source generators