#dotnet

Copilot Instructions for .NET / C# Projects

C# conventions for Copilot: nullable reference types treated as errors, Async suffix on every awaitable method, CancellationToken plumbing, and xUnit patterns that scale.

Use when: Use in a .NET 8+ solution when you want Copilot suggestions to respect nullable annotations, async conventions, and your xUnit test layout instead of producing 2015-era C#.