▸case-01 I'm building a high-throughput log parser in .NET 8 that needs to process large binary streams with minimal GC allocations. Can you write the C# service using low-allocation memory techniques, include XML documentation, set up a benchmark harness to test execution speed and allocation metrics, and write unit tests for edge cases using Moq and FluentAssertions? | fail→pass | 27,343 | 23,382 | -14% | 1 | 1 | 0% | 6,213 | 5,830 | -6% | 0 | 0 | — |
▸case-02 We need to refactor our legacy user management service in an ASP.NET Core application to use modern enterprise patterns. Please provide a decoupled async service layer implementation using pattern matching and nullable references, along with dependency injection setups, an EditorConfig file snippet for code standards, and a full suite of xUnit tests mocking EF Core interactions. | fail→fail | 25,198 | 20,576 | -18% | 1 | 1 | 0% | 6,207 | 5,170 | -17% | 0 | 0 | — |
▸case-03 I need a resilient asynchronous message handler in C# for a microservice backend that processes incoming order events. Please supply the production-ready code with robust error handling, full XML docs for public APIs, a sample BenchmarkDotNet class to compare serial vs parallel execution, and xUnit test cases covering failure scenarios. | pass→pass | 25,983 | 24,058 | -7% | 1 | 1 | 0% | 6,203 | 6,279 | +1% | 0 | 0 | — |
▸case-04 We are setting up a CI/CD pipeline step for our C# repository that runs a Python script to parse git commit history and format release notes. Can you write the Python script using python-git and markdown tools? | fail→fail | 15,433 | 15,360 | -0% | 1 | 1 | 0% | 3,502 | 4,046 | +16% | 0 | 0 | — |
▸case-21 Create an ASP.NET Core middleware component in C# that measures request duration, logs slow requests exceeding 500ms, and attaches a custom response header. | pass→pass | 9,675 | 14,183 | +47% | 1 | 1 | 0% | 2,114 | 3,668 | +74% | 0 | 0 | — |
▸case-05 Our web application uses ASP.NET Core for the backend, but we need help writing a frontend component in React TypeScript to render an interactive HTML5 chart. Can you write the React component? | fail→fail | 17,364 | 16,541 | -5% | 1 | 1 | 0% | 4,214 | 4,407 | +5% | 0 | 0 | — |
▸case-06 We need a raw PostgreSQL database migration script written in psql dialect to construct relational tables and trigger functions directly, without using EF Core or any C# tool. Can you write the psql script? | fail→fail | 14,944 | 9,881 | -34% | 1 | 1 | 0% | 3,799 | 2,551 | -33% | 0 | 0 | — |
▸case-07 I have a high-frequency parser for fixed-width string records in C#. Developers are considering using String.Substring across millions of iterations. What approach should be used to avoid heap allocations, and how should it be implemented? | fail→pass | 13,854 | 16,078 | +16% | 1 | 1 | 0% | 2,799 | 3,618 | +29% | 0 | 0 | — |
▸case-08 We need a domain model for an e-commerce order state machine (Pending, Processing, Shipped, Delivered, Cancelled) in C# 12. Developers want to represent state transitions cleanly without mutable classes or long switch statements. Show how to model these domain events and transitions. | pass→pass | 16,983 | 13,751 | -19% | 1 | 1 | 0% | 3,829 | 3,411 | -11% | 0 | 0 | — |
▸case-09 We are seeing NullReferenceExceptions in our modern .NET 8 web API context accessor. Provide a repository implementation that handles nullable entity queries safely with mandatory reference validation enabled. | fail→pass | 16,968 | 16,522 | -3% | 1 | 1 | 0% | 3,417 | 4,085 | +20% | 0 | 0 | — |
▸case-10 In an ASP.NET Core API, a developer wrote Task.Result and Thread.Sleep inside an asynchronous file download handler. Provide the corrected async C# service implementation. | pass→pass | 11,564 | 9,967 | -14% | 1 | 1 | 0% | 2,528 | 2,405 | -5% | 0 | 0 | — |
▸case-11 We want to measure the execution time and memory footprint differences between List<int> and ImmutableArray<int> iterations in .NET 8. Provide a benchmark test harness class. | pass→pass | 11,473 | 11,247 | -2% | 1 | 1 | 0% | 2,443 | 2,767 | +13% | 0 | 0 | — |
▸case-12 Write a unit test class for an InvoiceCalculator service in C# that tests dynamic tax calculation based on location rules. The team wants expressive assertion syntax and mock dependencies. | pass→pass | 13,797 | 12,415 | -10% | 1 | 1 | 0% | 3,141 | 3,194 | +2% | 0 | 0 | — |
▸case-13 Our enterprise team needs standardizing configuration rules for C# code styling, requiring var usage for built-in types to be explicit and enforcing XML documentation on all public members. Provide the configuration file snippet. | pass→pass | 5,975 | 6,054 | +1% | 1 | 1 | 0% | 1,217 | 1,562 | +28% | 0 | 0 | — |
▸case-14 We are configuring an ASP.NET Core application that consumes a scoped EF Core DbContext inside a background singleton IHostedService. Write the dependency injection registration and background worker implementation avoiding captive dependencies. | pass→pass | 11,247 | 11,520 | +2% | 1 | 1 | 0% | 2,275 | 2,941 | +29% | 0 | 0 | — |
▸case-15 We have a monolithic payment processor class using hardcoded concrete implementations for Stripe and PayPal. Refactor this C# code to follow SOLID principles. | fail→pass | 14,787 | 14,003 | -5% | 1 | 1 | 0% | 3,210 | 3,583 | +12% | 0 | 0 | — |
▸case-16 We need a centralized package management configuration file for a multi-project .NET solution to enforce locked dependency versions across all projects. Provide the XML manifest configuration. | pass→pass | 7,089 | 8,130 | +15% | 1 | 1 | 0% | 1,503 | 2,114 | +41% | 0 | 0 | — |
▸case-17 Provide a C# Blazor Interactive Server component that fetches customer data asynchronously on initialization and displays a loading indicator while pending. | fail→fail | 7,883 | 11,764 | +49% | 1 | 1 | 0% | 1,901 | 2,934 | +54% | 0 | 0 | — |
▸case-18 A read-only reporting endpoint in ASP.NET Core is causing severe memory pressure because EF Core tracks thousands of entities. Show the refactored LINQ query method. | pass→pass | 8,687 | 10,001 | +15% | 1 | 1 | 0% | 1,709 | 2,322 | +36% | 0 | 0 | — |
▸case-19 Our microservice HTTP client needs automatic retries with exponential backoff and circuit breaking when calling external downstream services. Provide the C# HTTP client registration snippet. | fail→pass | 7,992 | 10,838 | +36% | 1 | 1 | 0% | 1,589 | 2,652 | +67% | 0 | 0 | — |
▸case-20 We need a thread-safe, non-blocking producer-consumer pipeline in .NET 8 to stream telemetry events between background tasks. Provide the C# implementation. | pass→pass | 13,196 | 14,132 | +7% | 1 | 1 | 0% | 2,772 | 3,521 | +27% | 0 | 0 | — |
▸case-22 In a high-throughput caching service where 99% of requests return immediately from memory, refactor the async method signature to reduce object allocations on the hot path. | fail→pass | 13,580 | 12,230 | -10% | 1 | 1 | 0% | 2,390 | 3,022 | +26% | 0 | 0 | — |