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10 Prompts That Make Claude a Better .NET Pair Programmer
Copy-ready prompts for planning, edge cases, TDD, reviews and build errors, plus a tiny tested C# tool that feeds Claude your real project facts.
Most “Claude wrote bad C#” stories start the same way: someone pastes a method, types “fix this,” and gets back code that targets the wrong framework, pulls in a package the project doesn’t use, and quietly changes behavior nobody asked to change. The model isn’t the problem there. The prompt is. Claude can’t see your .csproj, your house rules or your tests unless you put them in front of it.
This article gives you 10 copy-ready prompts I use to turn Claude into a useful .NET pair programmer, the kind that asks before guessing, writes the failing test first and tells you how to verify its work. To make the first prompt effortless, we’ll also build a tiny C# tool, PairPromptKit, that reads your project file and writes the context block for you. Every command and test result below comes from a real run on .NET SDK 10.0.401.
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