dotnet-backend-patterns

Name: dotnet-backend-patterns
Author: tranhieutt

69stars41forks

How to install dotnet-backend-patterns?

tranhieutt/software_development_department/dotnet-backend-patterns

$npx -y skills add tranhieutt/software_development_department --skill dotnet-backend-patterns

Installs into the current project.

Summary

Provides .NET and ASP.NET Core patterns for REST APIs, Entity Framework, dependency injection, and middleware. Use when working with C# files (*.cs, *.csproj) or when the user mentions .NET, ASP.NET Core, C#, or Entity Framework.

Files · 1

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SKILL.md

1	# .NET Backend Development Patterns
2
3	C#/.NET patterns for production-grade APIs, MCP servers, and enterprise backends.
4
5	## API Structure (Minimal API + Controllers)
6
7	\`\`\`csharp
8	// Program.cs - Minimal API
9	var builder = WebApplication.CreateBuilder(args);
10	builder.Services.AddDbContext<AppDbContext>(o => o.UseNpgsql(connStr));
11	builder.Services.AddScoped<IOrderService, OrderService>();
12
13	var app = builder.Build();
14	app.MapGet("/orders/{id}", async (int id, IOrderService svc) =>
15	await svc.GetByIdAsync(id) is { } order ? Results.Ok(order) : Results.NotFound());
16	\`\`\`
17
18	## Dependency Injection Patterns
19
20	\`\`\`csharp
21	// Register services
22	builder.Services.AddScoped<IPaymentService, StripePaymentService>();
23	builder.Services.AddSingleton<ICacheService, RedisCacheService>();
24	builder.Services.AddHttpClient<IApiClient, ExternalApiClient>(client => {
25	client.BaseAddress = new Uri("https://api.external.com");
26	});
27	\`\`\`
28
29	Lifetime guide: Singleton (stateless/cache), Scoped (per-request), Transient (stateless utility).
30
31	## Entity Framework Core
32
33	\`\`\`csharp
34	// DbContext with conventions
35	public class AppDbContext : DbContext {
36	public DbSet<Order> Orders => Set<Order>();
37	protected override void OnModelCreating(ModelBuilder builder) {
38	builder.Entity<Order>().HasIndex(o => o.UserId);
39	builder.Entity<Order>().Property(o => o.Total).HasPrecision(18, 2);
40	}
41	}
42	\`\`\`
43
44	Performance tips:
45	- Use `.AsNoTracking()` for read-only queries
46	- Avoid N+1 with `.Include()` or projection
47	- Use compiled queries for hot paths
48
49	## Middleware Pipeline
50
51	\`\`\`csharp
52	app.UseMiddleware<RequestLoggingMiddleware>();
53	app.UseAuthentication();
54	app.UseAuthorization();
55	app.UseRateLimiter();
56	app.MapControllers();
57	\`\`\`
58
59	## Error Handling
60
61	\`\`\`csharp
62	// Global exception handler
63	app.UseExceptionHandler(err => err.Run(async context => {
64	var exception = context.Features.Get<IExceptionHandlerFeature>()?.Error;
65	var (status, message) = exception switch {
66	NotFoundException => (404, exception.Message),
67	UnauthorizedAccessException => (403, "Forbidden"),
68	_ => (500, "Internal server error")
69	};
70	context.Response.StatusCode = status;
71	await context.Response.WriteAsJsonAsync(new { error = message });
72	}));
73	\`\`\`
74
75	## Configuration (IOptions pattern)
76
77	\`\`\`csharp
78	builder.Services.Configure<StripeSettings>(
79	builder.Configuration.GetSection("Stripe"));
80
81	// Usage
82	public class PaymentService(IOptions<StripeSettings> opts) {
83	private readonly string _key = opts.Value.SecretKey;
84	}
85	\`\`\`
86
87	## Testing
88
89	\`\`\`csharp
90	// Integration test with WebApplicationFactory
91	public class OrderApiTests : IClassFixture<WebApplicationFactory<Program>> {
92	private readonly HttpClient _client;
93	[Fact]
94	public async Task GetOrder_ReturnsOk() {
95	var response = await _client.GetAsync("/orders/1");
96	response.StatusCode.Should().Be(HttpStatusCode.OK);
97	}
98	}
99	\`\`\`
100
101	## Related Skills
102
103	- `backend-architect` — architecture decisions
104	- `database-architect` — schema design
105	- `drizzle-orm-expert` — Node.js ORM alternative

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Type

dotnet-backend-patterns

69stars41forks

View on GitHub

How to install dotnet-backend-patterns?

tranhieutt/software_development_department/dotnet-backend-patterns

$npx -y skills add tranhieutt/software_development_department --skill dotnet-backend-patterns

Installs into the current project.

Summary

Files · 1

View on GitHub

SKILL.md

1	# .NET Backend Development Patterns
2
3	C#/.NET patterns for production-grade APIs, MCP servers, and enterprise backends.
4
5	## API Structure (Minimal API + Controllers)
6
7	\`\`\`csharp
8	// Program.cs - Minimal API
9	var builder = WebApplication.CreateBuilder(args);
10	builder.Services.AddDbContext<AppDbContext>(o => o.UseNpgsql(connStr));
11	builder.Services.AddScoped<IOrderService, OrderService>();
12
13	var app = builder.Build();
14	app.MapGet("/orders/{id}", async (int id, IOrderService svc) =>
15	await svc.GetByIdAsync(id) is { } order ? Results.Ok(order) : Results.NotFound());
16	\`\`\`
17
18	## Dependency Injection Patterns
19
20	\`\`\`csharp
21	// Register services
22	builder.Services.AddScoped<IPaymentService, StripePaymentService>();
23	builder.Services.AddSingleton<ICacheService, RedisCacheService>();
24	builder.Services.AddHttpClient<IApiClient, ExternalApiClient>(client => {
25	client.BaseAddress = new Uri("https://api.external.com");
26	});
27	\`\`\`
28
29	Lifetime guide: Singleton (stateless/cache), Scoped (per-request), Transient (stateless utility).
30
31	## Entity Framework Core
32
33	\`\`\`csharp
34	// DbContext with conventions
35	public class AppDbContext : DbContext {
36	public DbSet<Order> Orders => Set<Order>();
37	protected override void OnModelCreating(ModelBuilder builder) {
38	builder.Entity<Order>().HasIndex(o => o.UserId);
39	builder.Entity<Order>().Property(o => o.Total).HasPrecision(18, 2);
40	}
41	}
42	\`\`\`
43
44	Performance tips:
45	- Use `.AsNoTracking()` for read-only queries
46	- Avoid N+1 with `.Include()` or projection
47	- Use compiled queries for hot paths
48
49	## Middleware Pipeline
50
51	\`\`\`csharp
52	app.UseMiddleware<RequestLoggingMiddleware>();
53	app.UseAuthentication();
54	app.UseAuthorization();
55	app.UseRateLimiter();
56	app.MapControllers();
57	\`\`\`
58
59	## Error Handling
60
61	\`\`\`csharp
62	// Global exception handler
63	app.UseExceptionHandler(err => err.Run(async context => {
64	var exception = context.Features.Get<IExceptionHandlerFeature>()?.Error;
65	var (status, message) = exception switch {
66	NotFoundException => (404, exception.Message),
67	UnauthorizedAccessException => (403, "Forbidden"),
68	_ => (500, "Internal server error")
69	};
70	context.Response.StatusCode = status;
71	await context.Response.WriteAsJsonAsync(new { error = message });
72	}));
73	\`\`\`
74
75	## Configuration (IOptions pattern)
76
77	\`\`\`csharp
78	builder.Services.Configure<StripeSettings>(
79	builder.Configuration.GetSection("Stripe"));
80
81	// Usage
82	public class PaymentService(IOptions<StripeSettings> opts) {
83	private readonly string _key = opts.Value.SecretKey;
84	}
85	\`\`\`
86
87	## Testing
88
89	\`\`\`csharp
90	// Integration test with WebApplicationFactory
91	public class OrderApiTests : IClassFixture<WebApplicationFactory<Program>> {
92	private readonly HttpClient _client;
93	[Fact]
94	public async Task GetOrder_ReturnsOk() {
95	var response = await _client.GetAsync("/orders/1");
96	response.StatusCode.Should().Be(HttpStatusCode.OK);
97	}
98	}
99	\`\`\`
100
101	## Related Skills
102
103	- `backend-architect` — architecture decisions
104	- `database-architect` — schema design
105	- `drizzle-orm-expert` — Node.js ORM alternative

People who liked this also viewed

6 picks

Type