csharp

name	csharp
description	C# / .NET with dotnet CLI, ASP.NET, Entity Framework, and best practices. Use when writing or editing .cs files, .csproj, working with dotnet CLI, ASP.NET, Blazor, or Entity Framework.

C#

.NET CLI

• dotnet new console - create console app
• dotnet new webapi - create Web API
• dotnet new sln - create solution
• dotnet sln add <project> - add project to solution
• dotnet build - build project/solution
• dotnet run - build and run
• dotnet test - run tests
• dotnet publish -c Release - publish for deployment
• Use --framework net10.0 for .NET 10

Code Conventions

• Use var when type obvious. Explicit types for public APIs.
• async/await - never .Result or .Wait()
• nameof() not hardcoded strings
• Nullable reference types: <Nullable>enable</Nullable>
• Expression-bodied members for simple properties
• PascalCase public, camelCase private, _prefix fields
• IEnumerable<T> over List<T> for returns (iteration only)
• using statements for IDisposable

Project Structure

MyApp/
├── MyApp.sln
├── src/
│   └── MyApp/
│       ├── MyApp.csproj
│       └── Program.cs
└── tests/
    └── MyApp.Tests/

Verification

• Build: dotnet build --nologo
• Run: dotnet run --project <path>
• Test: dotnet test
• Check .NET version: dotnet --version