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Use when loading secrets from Google Cloud Secret Manager into IConfiguration at startup — AddGcpSecretManager() registers a configuration provider that pulls named secrets so they are available as standard config values throughout the application.
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Use when representing optional values explicitly — Maybe<T> as a null-safe container, Maybe.From()/FromTry() for creation, HasValue/HasNoValue, Map/Bind chaining, TapNone for None-side effects, Match for consumption, and ToMaybeResult() to bridge into the Result pattern.
Use when handling operation outcomes without exceptions — Result and Result<T> for success/failure, railway-oriented chaining with Then/ThenAsync/Ensure, Match for consumption, and Result.And/Or for combining multiple results.
Use when composing business validation logic — define rules as classes, Func fields, or inline lambdas; combine with .And()/.Or()/.Linear()/.Next(); evaluate with RuleEngine.Evaluate(); branch with RuleEngine.If().
Use when modeling partial success — These<TError, TValue> holds Left (error only), Right (value only), or Both (error + value), enabling scenarios where a result can partially succeed while carrying warnings. Use FromResult to bridge from Result<T>, ToResult/ToResultLenient to bridge back, and Partition to split collections.
Use when you need testable time — IDateTimeProvider wraps clock access so production code uses DateTimeProvider while tests use the built-in FakeDateTimeProvider to freeze/advance/set the clock; also provides .ToDateOnly() and .ToTimeOnly() DateTime extension methods.
Use when adding cross-cutting pipeline behaviors to CQRS handlers — ValidationBehavior (CSharpEssentials.Validation, throws EnhancedValidationException), LoggingBehavior (ILoggableRequest), ExceptionHandlingBehavior (auto-converts exceptions to Result.Failure for Result-returning handlers), CachingBehavior (ICacheable with IDistributedCache), and TransactionScopeBehavior (ITransactionalRequest).
| name | csharpessentials-gcpsecretmanager |
| description | Use when loading secrets from Google Cloud Secret Manager into IConfiguration at startup — AddGcpSecretManager() registers a configuration provider that pulls named secrets so they are available as standard config values throughout the application. |
Configuration provider that loads secrets from Google Cloud Secret Manager into the standard IConfiguration system. Secrets become available like any other config value after startup.
dotnet add package CSharpEssentials.GcpSecretManager
using CSharpEssentials.GcpSecretManager;
// Program.cs — add before building the app
builder.Configuration.AddGcpSecretManager(options =>
{
options.ProjectId = "my-gcp-project";
options.Secrets = ["db-connection-string", "stripe-api-key", "jwt-secret"];
});
// Secrets available anywhere via IConfiguration
var connStr = config["db-connection-string"];
var apiKey = config["stripe-api-key"];
// Or via IOptions<T> / strongly-typed binding
builder.Services.Configure<DatabaseOptions>(builder.Configuration.GetSection("Database"));
Uses Application Default Credentials (ADC). In GCP environments (Cloud Run, GKE, Compute Engine), the service account is used automatically. For local development:
gcloud auth application-default login
AddGcpSecretManager() after AddJsonFile() calls so GCP secrets override local configIConfiguration key conventions (db-connection-string → config["db-connection-string"])Secret Manager Secret Accessor IAM role only — not Viewerappsettings.json — the point is to keep them out of source control