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Found 282 Skills
Migrate a .NET 10 project or solution to .NET 11 and resolve all breaking changes. This is a MIGRATION skill — use it when upgrading from .NET 10 to .NET 11, NOT for writing new programs. USE FOR: upgrading TargetFramework from net10.0 to net11.0, fixing build errors after updating the .NET 11 SDK, resolving source-breaking and behavioral changes in .NET 11 runtime, C# 15 compiler, and EF Core 11, adapting to updated minimum hardware requirements (x86-64-v2, Arm64 LSE), and updating CI/CD pipelines and Dockerfiles for .NET 11. DO NOT USE FOR: .NET Framework migrations, upgrading from .NET 9 or earlier, greenfield .NET 11 projects, or cosmetic modernization unrelated to the upgrade. NOTE: .NET 11 is in preview. Covers breaking changes through Preview 3.
CCXT cryptocurrency exchange library for C# and .NET developers. Covers both REST API (standard) and WebSocket API (real-time). Helps install CCXT, connect to exchanges, fetch market data, place orders, stream live tickers/orderbooks, handle authentication, and manage errors in .NET projects. Use when working with crypto exchanges in C# applications, trading systems, or financial software. Supports .NET Standard 2.0+.
ASP.NET Core cross-platform .NET framework with Blazor support. Use for C# web apps.
Add a new Umbraco extension project reference to the main Umbraco instance and solution
Develops end-to-end UI tests with Playwright for Blazor applications. Use when: Writing E2E tests, testing Blazor WASM pages, validating UI flows, checking responsive design, detecting JavaScript errors, or testing MudBlazor components.
Test email sending locally using Mailpit with .NET Aspire. Captures all outgoing emails without sending them. View rendered HTML, inspect headers, and verify delivery in integration tests.
Catalog of MSBuild anti-patterns with detection rules and fix recipes. Only activate in MSBuild/.NET build context. Use when reviewing, auditing, or cleaning up .csproj, .vbproj, .fsproj, .props, .targets, or .proj files. Each anti-pattern has a symptom, explanation, and concrete BAD→GOOD transformation. DO NOT use for non-MSBuild build systems (npm, Maven, CMake, etc.).
Baseline C# skill loaded for every .NET code path. Guides language patterns (records, pattern matching, primary constructors, C# 8-15), coding standards, async/await, DI, LINQ, serialization, domain modeling, concurrency, Roslyn analyzers, globalization, native interop (P/Invoke, LibraryImport, ComWrappers), WASM interop (JSImport/JSExport), and type design. Spans 25 topics. Do not use for ASP.NET endpoint architecture, UI framework patterns, or CI/CD guidance.
Use this skill when writing or reviewing C# code to follow project conventions. Covers naming standards, async patterns, CancellationToken usage, structured logging, nullable reference types, and formatting rules. Apply when authoring new C# classes, reviewing code style, or ensuring consistency with existing patterns.
Create, read, edit, secure, sign, and convert PDF documents (.pdf) using Syncfusion PDF Library for .NET. Use this skill for PDF processing and document automation when the user asks to generate PDF files, modify PDF content, add security or signatures, extract text or images, merge or split PDFs, or perform PDF/A conversion using C# code or CSX execution.
Guides implementation of the Syncfusion WinForms AutoLabel control for automatic label positioning with form controls. Use when users want to add labels that automatically reposition when controls move, create form layouts with paired label-control units, implement complex form designs with FlowLayout, or ensure labels stay synchronized with their associated controls. Covers labeling controls, positioning, spacing, size settings, theming, and events.
Guide for implementing Syncfusion Gauge controls in Windows Forms applications. Use when creating data visualization gauges such as RadialGauge for circular displays (speedometers, temperature dials), LinearGauge for horizontal/vertical bars and progress indicators, or DigitalGauge for LED-style alphanumeric displays. Covers dashboard gauges, instrument panels, real-time monitoring, and KPI displays with needles, ranges, and scales.