C# Online Runner

The tool compiles and executes C# code submitted by the user in a secure in-browser sandbox. It supports both small code snippets and full console applications, with optional inputs and compile-time options. Conceptually, the service builds an in-memory project, resolves NuGet references where allowed, and runs the code inside a constrained environment that enforces time and memory limits. Outputs are captured from standard output and standard error, and the exit code is returned for diagnostic purposes. This enables rapid experimentation, teaching, and debugging workflows for learners, educators, and developers who want to validate logic without setting up a local .NET toolchain. Unique value lies in safe isolation, detailed error reporting with line numbers, and configurable constraints that prevent unbounded resource use. Core features include: code editing area (conceptual), execution mode selection (snippet vs full program), input data support, labeled stdout/stderr capture, and diagnostic results. Use cases include quick algorithm checks, learning exercises, code demonstrations, and interview prep. The tool emphasizes reproducibility by running the same code under controlled limits and exposing a clear, structured output payload for downstream tooling.