dotnet-csharp-configuration

Use the Options pattern to bind appsettings.json configuration sections to strongly-typed classes. This ensures safe, maintainable access to application settings like database connection strings and API keys via IOptions, IOptionsSnapshot, or IOptionsMonitor.

Implement feature flags in .NET using Microsoft.FeatureManagement. This enables dynamic feature toggles for A/B testing and phased rollouts, allowing you to toggle features without redeploying your application by applying custom filters.

.NET configuration source precedence follows a specific order when merging appsettings.json, environment variables, user secrets, and command-line arguments. Understanding this hierarchy ensures the correct settings override others in different deployment environments.

IOptionsSnapshot is used when configuration needs to be recalculated per request scope, whereas standard IOptions is singleton. IOptionsMonitor is used for real-time configuration change detection, allowing reactive updates without application restarts.

Yes, user secrets securely manage sensitive data like API keys during local .NET development. This prevents storing confidential credentials in source control by keeping them separate from your appsettings.json files.

Yes, Microsoft.FeatureManagement supports custom feature flag filters. You can implement tailored filtering logic to conditionally enable features based on specific parameters, providing granular control over your application's behavior.