modern-app-patterns

.NET Patterns (C#)

Practical patterns for ASP.NET Core and .NET MAUI. Each guide includes a live end-to-end example you can copy/paste.

• Architecture
  • MVVM with CommunityToolkit
  • Clean Architecture (API + Application + Domain + Infrastructure)
• Data & HTTP
  • Repository + DTO mapping with HttpClient
  • Caching with IMemoryCache/IDistributedCache
• DI & Messaging
  • Dependency Injection with Microsoft.Extensions.DependencyInjection
  • Mediator pattern with MediatR

Tip: start from these in a sandbox project, then extract stable pieces into your layers (Domain, Application, Infrastructure).

Try it

Minimal API (ASP.NET Core)

# 1) Create and run a sandbox Minimal API
dotnet new web -n api-sandbox
cd api-sandbox

# 2) Add packages as needed
dotnet add package MediatR
dotnet add package Microsoft.Extensions.Caching.StackExchangeRedis

# 3) Paste Program.cs snippets from the guides (repository, caching, MediatR)
# 4) Run
dotnet run

.NET MAUI (Windows)

# 1) Install workloads if needed
dotnet workload install maui

# 2) Create a MAUI app
dotnet new maui -n MauiSandbox
cd MauiSandbox

# 3) Add CommunityToolkit.Mvvm
dotnet add package CommunityToolkit.Mvvm

# 4) Paste ViewModel, XAML, and DI snippets from the MAUI guide

# 5) Build/Run (targets vary; use VS or dotnet)
dotnet build

See also: ../sandboxes/dotnet-minimal-api and ../sandboxes/dotnet-maui for skeletons and Program.cs/App wiring you can paste.

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