<ul><li>Feature flags provide fine-grained control over application behavior by allowing features to be turned on/off, run experiments, and roll back changes instantly without redeploying.</li><li>Microsoft.FeatureManagement is a first-party package in .NET that offers flexible filters, clean architecture alignment, and integrates with .NET configuration and dependency injection.</li><li>To implement feature flags in .NET using Microsoft.FeatureManagement, you first define flags in configuration, wire up the feature management services in Program.cs, use flags in endpoints with manual checks or attribute-based gating, and create custom feature providers for fetching flags from external services.</li><li>Testing feature flags can be done through unit tests for attribute endpoints and integration tests for custom providers, providing the ability to release changes safely and frequently.</li></ul>

Feature Flags in .NET

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