@dotnet
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Home of the open source .NET platform
112 skills1 repository 5.7K
Choose diagnostic tools and collect performance traces for production .NET problems such as high CPU usage, memory growth, or slow requests. Get environment-specific collection commands and guidance on which tools to use for later analysis.
Design, configure, run, and review BenchmarkDotNet measurements of small .NET operations. Compare implementations, runtime versions, or input sizes, while controlling setup work, measurement errors, and case counts so results support a concrete performance decision.
Review mock configurations in .NET tests by tracing the production code each test exercises. Identify unused, unreachable, duplicated, or replaceable setups, explain concrete fixes, and distinguish them from appropriate mocks for databases, HTTP clients, and other external services.
Plan initialization, state saving, restoration, and cleanup around .NET MAUI app lifecycle events. Understand how Window events map to each platform, distinguish lost focus from backgrounding, and account for multiple windows.
Create or review Blazor components, reusable parts of a web interface. Covers passing data and events between parent and child components, content templates, asynchronous work, display states, and resource cleanup when components are removed.
Diagnose and fix .NET MAUI development environment problems involving SDKs, Java, Android tools, and platform requirements. The skill discovers required versions from NuGet metadata and checks the environment again after each fix.
Investigate .NET app crashes on Apple platforms by converting runtime addresses in .ips logs into function names, source files, and line numbers. It locates matching debug symbols and supports retrieving logs from connected iOS devices.
Add, review, or fix calls between Blazor and JavaScript. Organize JavaScript modules alongside components, control when calls run, combine related operations, and clean up references with handling for server disconnections.
Plan and implement complex Blazor pages by dividing them into focused components. Define parent and child relationships, decide where data is managed, map data and events between components, and establish the order for building them.
Diagnose why MSBuild builds across multiple projects fail to run efficiently in parallel. Use build logs and project dependencies to identify blocking chains, then recommend changes to references, scheduling, or parallel execution settings.
Review database access built with Entity Framework Core to find slow queries, excessive database calls, memory costs, and correctness issues. It traces application code and uses available SQL logs or execution plans to support targeted fixes.
Adjust .NET MAUI layouts to avoid system bars, screen cutouts, and keyboards, or extend content to screen edges. It covers .NET 10 safe area APIs, migration from older settings, and CSS coordination for Blazor Hybrid.
Choose when MSBuild copies files to build or publish folders. The skill explains settings that avoid unnecessary copies, restore output files changed by tests or apps, and apply shared copy behavior across existing projects.
Diagnose MSBuild failures from an existing binary build log. Inspect errors, settings, project references, and execution details to explain failures that console output alone does not clarify, including failures across multiple projects.
Select technologies for AI and machine learning features in .NET 8+ applications. Get task-specific plans or implementation guidance for structured predictions, text generation, document retrieval, tool-using agents, and running pretrained models locally or in production.
Run small C# apps without creating a project, using the .NET CLI, its command-line tool. Use it to test language features, explore APIs, or prototype utilities with helper files and NuGet packages.
Optimize .NET loops with SIMD, which processes multiple values in one operation, or review existing SIMD code. Check behavioral equivalence, memory safety, platform fallbacks, and benchmarks to establish whether the optimization is correct and worthwhile.
Analyze .NET test suites for repeated setup, assertions, and copied test methods. Get a report with file locations, before-and-after refactoring examples, priorities, and readability trade-offs, without changing the source files.
Write and review .NET calls to native C/C++ libraries using P/Invoke. Covers function declarations, string conversion, memory ownership, and platform differences to help investigate crashes, memory leaks, and corrupted data.
Analyze CLR activation logs to explain how .NET Framework selects and loads its runtime, the software that executes managed code. Diagnose loading failures, unexpected version choices, installation dialogs, and conflicting activation paths within a process.
Build page navigation in .NET MAUI apps using Shell. Configure tabs and slide-out menus, register page routes, pass data between pages, and add confirmation dialogs before users leave a page.
Capture MSBuild execution records as binary logs during .NET builds, tests, packaging, publishing, or restores. It explains unique filenames, PowerShell quoting, and file checks so logs remain available for later failure or performance analysis.
Configure dependency injection in .NET MAUI, a way to supply objects with the services they need. Covers service registration, instance lifetimes, page and ViewModel constructors, Shell navigation, platform implementations, and test substitutions.
Convert an older Blazor Server app into a .NET 8+ Blazor Web App while preserving interactive server behavior. It guides changes to page structure, startup configuration, authentication state sharing, and validation of the converted app.
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