dotnet-multi-tenant

Multi-tenant isolation in an ASP.NET Core API is implemented by using middleware to resolve tenants from headers or JWT claims, dynamically validating per-tenant JWT secrets, and routing requests to per-tenant databases via a scoped DbContext factory.

Yes, you can validate JWT tokens using different secrets for each tenant in .NET by employing dynamic JWT secret lookup. The system resolves the tenant context first, then applies the specific tenant's secret to validate the token signature.

You propagate TenantId through middleware and ACL layers without modifying existing models by utilizing TenantMiddleware and scoped dependency injection patterns. This automatically flows the TenantContext across API and supporting layers without requiring structural model changes.

The best way to create a per-tenant DbContext in .NET is using a TenantDbContextFactory. This factory generates scoped DbContext instances configured with per-tenant database connections, ensuring complete data isolation based on the resolved TenantContext.

No, this multi-tenant .NET pattern does not require modifying existing DbContext models. It achieves per-tenant database isolation and automatic TenantId propagation through scoped dependency injection and a DbContext factory without altering your existing models or DbContext structure.