.NET 10 / C# 13 Skill

This codebase uses .NET 10 (LTS) with C# 13, configured with strict nullable reference types, implicit usings, and XML documentation. All services follow the same project configuration patterns and share infrastructure through Sorcha.ServiceDefaults .

Quick Start

Project Configuration

<Project Sdk="Microsoft.NET.Sdk.Web"> <PropertyGroup> <TargetFramework>net10.0</TargetFramework> <ImplicitUsings>enable</ImplicitUsings> <Nullable>enable</Nullable> <GenerateDocumentationFile>true</GenerateDocumentationFile> <NoWarn>$(NoWarn);CS1591</NoWarn> </PropertyGroup> </Project>

Service Setup Pattern

var builder = WebApplication.CreateBuilder(args);

// Always call AddServiceDefaults first builder.AddServiceDefaults();

// Add service-specific dependencies builder.Services.AddScoped<IMyService, MyService>();

// Add JWT authentication (shared from ServiceDefaults) builder.AddJwtAuthentication();

var app = builder.Build(); app.MapDefaultEndpoints(); app.UseAuthentication(); app.UseAuthorization();

Key Concepts

Concept Usage Example

Primary constructors Services with DI class MyService(IRepo repo)

Collection expressions Default values List<T> Items = []

Required members DTOs/contracts public required string Id { get; set; }

Records Value objects, DTOs public record PagedResult<T>(...)

Raw string literals Multi-line docs """Markdown content"""

Common Patterns

Global Usings

// GlobalUsings.cs global using System; global using System.Collections.Generic; global using System.Linq; global using System.Threading; global using System.Threading.Tasks; global using Sorcha.MyProject.Domain; // Project-specific

Test Project Setup

<ItemGroup> <Using Include="Xunit" /> <Using Include="Moq" /> <Using Include="FluentAssertions" /> </ItemGroup>

See Also

• patterns - C# 13 features and code patterns

• workflows - Build, test, and deployment workflows

Related Skills

• aspire - .NET Aspire orchestration and service defaults

• minimal-apis - Endpoint configuration with MapGet/MapPost

• xunit - Test project configuration and patterns

• entity-framework - EF Core integration with repositories

Documentation Resources

Fetch latest .NET documentation with Context7.

How to use Context7:

• Use mcp__context7__resolve-library-id to search for "dotnet"

• Prefer website documentation (IDs starting with /websites/ ) over source code repositories when available

• Query with mcp__context7__query-docs using the resolved library ID

Library ID: /websites/learn_microsoft_en-us_dotnet (high reputation, 42K+ snippets)

Recommended Queries:

• "C# 13 new features primary constructors"

• "collection expressions syntax"

• "required members properties"

• "nullable reference types"