dotnet-secrets-management Cloud-agnostic secrets management for .NET applications. Covers the full lifecycle: user secrets for local development, environment variables for production, IConfiguration binding patterns, secret rotation, and managed identity as a production best practice. Includes anti-patterns to avoid (secrets in source, appsettings.json, hardcoded connection strings). Out of scope: Cloud-provider-specific vault services (Azure Key Vault, AWS Secrets Manager, GCP Secret Manager) -- those are covered by cloud-specific epics. Authentication/authorization implementation (OAuth, Id…