Handbook .NET

.NET development tools including automatic CSharpier formatting for C# files and dotnet run file support.

Features

• Automatic CSharpier formatting for .cs files after Claude edits them
• Performance optimized with --skip-validation
• Non-blocking warnings
• Uses .csharpierrc config if present
• dotnet-run-file skill: Run C# files directly without projects (.NET 10+)
• coverage-report skill: Generate code coverage reports scoped to branch changes

Prerequisites

Install CSharpier:

dotnet tool install -g csharpier

Installation

/plugin marketplace add nikiforovall/claude-code-rules
/plugin install handbook-dotnet

Configuration

Disable formatting:

Custom config: Place .csharpierrc or .csharpierrc.json in your project root.

Skills

dotnet-run-file

Run C# code directly without creating project files using .NET 10's dotnet run file.cs feature.

Invoke the skill:

Use the dotnet-run-file skill to help me run this C# code

Quick examples:

# Run a .cs file
dotnet run app.cs

# One-liner via stdin (Claude Code friendly)
echo 'Console.WriteLine("Hello");' | dotnet run -

# Multi-line with heredoc
dotnet run - << 'EOF'
var now = DateTime.Now;
Console.WriteLine($"Time: {now}");
EOF

# With NuGet package
dotnet run - << 'EOF'
#:package Humanizer@*
using Humanizer;
Console.WriteLine(TimeSpan.FromMinutes(90).Humanize());
EOF

Directives:

• #:package Humanizer@* - Add NuGet packages (version required)
• #:sdk Microsoft.NET.Sdk.Web - Set SDK (for web apps)
• #:property LangVersion preview - MSBuild properties

See skills/dotnet-run-file/references/ for detailed guides.