dotnet-backend-patterns

Master C#/.NET backend development patterns for building robust APIs, MCP servers, and enterprise applications. Covers async/await, dependency injection, Entity Framework Core, Dapper, configuration, caching, and testing with xUnit. Use when developing .NET backends, reviewing C# code, or designing API architectures.

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npx tessl i github:wshobson/agents --skill dotnet-backend-patterns

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Review — 82%

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Evaluation — 85%

Agent success when using this skill

Validation — 10 / 11 Passed

Validation for skill structure

SKILL.md

Review

Evals

Evaluation results

88%

13%

Multi-Channel Shipment Notification Service

Async patterns and service design

Criteria

Without context

With context

Parallel dispatch

100%

ConfigureAwait(false)

100%

ValueTask hot path

No blocking calls

100%

No async void

100%

CancellationToken propagation

100%

Result<T> return type

50%

80%

Typed configuration via IOptions

100%

Record types for models

100%

IServiceCollection extension

100%

Without context: $0.5512 · 2m 9s · 17 turns · 18 in / 9,934 out tokens

With context: $1.0949 · 3m 37s · 28 turns · 306 in / 15,961 out tokens

84%

13%

Order Management Backend with EF Core

EF Core data access patterns

Criteria

Without context

With context

AsNoTracking on reads

50%

100%

DTO/projection select

Include and ThenInclude

100%

AsSplitQuery

Compiled query

100%

ExecuteUpdateAsync bulk

100%

DbContext pooling

100%

Retry on failure

100%

IEntityTypeConfiguration

100%

Column constraints

100%

Indexes defined

100%

Global soft-delete filter

100%

Without context: $0.4162 · 1m 19s · 19 turns · 19 in / 5,425 out tokens

With context: $1.0450 · 2m 15s · 33 turns · 88 in / 8,670 out tokens

84%

20%

High-Performance Product Catalog Search with Caching

Dapper patterns and caching

Criteria

Without context

With context

CommandDefinition + CT

100%

DynamicParameters

100%

QueryMultiple pagination

44%

100%

IDbConnectionFactory

100%

No SQL injection

100%

Multi-mapping splitOn

22%

Two-tier cache check

Consistent cache keys

100%

Stale-while-revalidate

100%

Mock dependencies + _sut

55%

100%

Theory + InlineData

100%

Without context: $0.6326 · 2m 18s · 23 turns · 23 in / 10,118 out tokens

With context: $1.0437 · 2m 36s · 26 turns · 272 in / 10,830 out tokens

Evaluated: 3 days ago
Agent: Claude Code

Table of Contents

Multi-Channel Shipment Notification Service Order Management Backend with EF Core High-Performance Product Catalog Search with Caching

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