Claude Skills Guide

Claude Code Skills for C# .NET Developers

C# and .NET development involves repetitive patterns that Claude Code skills can automate. From scaffolding projects to generating unit tests and API documentation, these skills integrate directly into your development workflow. This guide covers practical skills for .NET developers who want to speed up common tasks.

xlsx: Spreadsheet Automation for Data-Driven Development

The xlsx skill handles spreadsheet operations tracking metrics, test coverage, or sprint data.

// Generate a bug tracking spreadsheet programmatically
// The skill creates formulas, charts, and formatted tables
"Bug report spreadsheet with columns: ID, Severity, Status, Assignee, Created Date"

This skill proves valuable when importing/exporting data between your .NET application and Excel. Generate reports with pivot tables, conditional formatting based on severity levels, and automated calculations.

docx: Technical Documentation Generation

The docx skill creates professional Word documents from your .NET project documentation.

// Generate API documentation or technical specs
"Create a specification document for the UserAuthentication service"

This skill supports:

For .NET projects with extensive XML documentation comments, docx can transform those into polished documentation.

pdf: PDF Generation and Manipulation

The pdf skill handles PDF operations for reports, invoices, and documentation in .NET applications.

// Generate PDF reports from structured data
"Create a quarterly performance report PDF with charts and tables"

This skill works well for:

pptx: Presentation Creation

The pptx skill builds presentations for architecture reviews, sprint demos, and technical training.

// Create architecture diagrams or demo slides
"Generate a slide deck explaining the microservices architecture"

Presentations generated by this skill include proper formatting, speaker notes, and can incorporate data visualizations from your .NET application.

webapp-testing: Automated Testing for .NET Applications

The webapp-testing skill helps verify frontend functionality in ASP.NET Core applications.

# Test API endpoints and UI components
"Verify the user login endpoint returns 200 OK with valid credentials"

This skill supports:

// Example test case generated by the skill
[Fact]
public async Task Login_WithValidCredentials_ReturnsSuccess()
{
    var client = _factory.CreateClient();
    var response = await client.PostAsJsonAsync("/api/auth/login", 
        new { Email = "test@example.com", Password = "validpassword" });
    
    Assert.Equal(HttpStatusCode.OK, response.StatusCode);
}

mcp-builder: Building Model Context Protocol Servers

The mcp-builder skill helps create MCP servers that extend Claude Code capabilities for .NET services.

// Scaffold an MCP server for your .NET API
"Create an MCP server that exposes database query capabilities"

This skill generates:

Many .NET developers use this to build custom integrations between Claude Code and internal systems.

Consistent Styling for Applications

Claude Code helps apply consistent visual themes across your documentation and presentations. Describe your brand requirements and Claude will apply them to generated artifacts.

# Apply a theme to match your application
"Apply a dark theme with blue accents to these slides"

For .NET developers building enterprise applications, this approach ensures consistency between documentation, presentations, and UI mockups.

Project Documentation and Updates

Claude Code helps generate status reports, sprint updates, and technical documentation through direct prompting.

# Generate a status report from task data
"Sprint 12 status report: completed user auth, started payment integration"

This produces:

Combining Skills in .NET Workflows

The real productivity gains appear when chaining skills together. Here is a practical workflow:

  1. Use mcp-builder to create a custom MCP server for your domain
  2. Apply webapp-testing to verify new API endpoints
  3. Generate documentation with docx and pdf
  4. Create presentation slides with pptx for sprint reviews
  5. Track metrics in spreadsheets using xlsx
// This workflow reduces context switching between tools
// All within Claude Code, no IDE switching required

Practical Example: Building a Feature End-to-End

Consider adding a new payment processing module to your .NET application:

# Step 1: Scaffold the domain models
"Create C# record types for Payment, PaymentMethod, and Transaction"

# Step 2: Write unit tests first
"Generate xUnit tests for the PaymentService with mock dependencies"

# Step 3: Document the API
"Create API documentation for the payment endpoints in Word format"

# Step 4: Generate test reports
"Spreadsheet tracking payment test coverage by feature"

Each step stays within Claude Code, maintaining your development flow without jumping between tools.

Choosing Skills Based on Your .NET Role

Different developer roles benefit from different skill combinations:

Start with skills matching your most frequent tasks. As your workflow matures, add skills that address new pain points.

Summary

Claude Code skills for .NET development focus on automation, documentation, and testing. The xlsx skill handles spreadsheet operations, docx and pdf generate documentation, webapp-testing verifies application behavior, and mcp-builder creates custom integrations. Combine these skills to reduce repetitive tasks and maintain focus on solving domain problems.

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