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multi-tenancy

Implement tenant isolation in .NET with EF Core query filters and middleware.

4|1|Updated Mar 15, 2026
Search Tags:#multi-tenancy#tenant isolation#ef-core#schema-per-tenant#tenant-resolution#database-per-tenant
One-click install
npx skills add https://github.com/FaysilAlshareef/dotnet-ai-kit --skill multi-tenancy-faysilalshareef
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: multi-tenancy
Source: https://github.com/FaysilAlshareef/dotnet-ai-kit/tree/main/skills/architecture/multi-tenancy
Command: npx skills add https://github.com/FaysilAlshareef/dotnet-ai-kit --skill multi-tenancy-faysilalshareef

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Multi-tenant .NET applications risk data leakage, operational interference, and complex connection management; this guide provides patterns to enforce tenant isolation, automate onboarding, and prevent cross-tenant access.

Core Features & Use Cases

  • Tenant resolution middleware that resolves tenant context from JWT claims, headers, subdomain, or query parameters and makes it available via a scoped provider.
  • Per-tenant data strategies including database-per-tenant, schema-per-tenant, and shared-database with global EF Core query filters and tenant stamping on save.
  • Operational guidance for onboarding/offboarding tenants, caching with tenant keys, background job tenancy, and migration/backfill strategies for existing schemas.
  • Use Case: Convert a single-tenant order management system into a secure SaaS platform where each customer has logically isolated data and per-tenant connection handling.

Quick Start

Add tenant resolution middleware, register a scoped tenant provider, apply global EF Core query filters for all tenant-scoped entities, and route DbContext construction to per-tenant connection strings or fallback defaults.

Frequently Asked Questions about multi-tenancy

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I implement tenant isolation in a .NET SaaS application using EF Core?▼

Implement tenant isolation in .NET by applying EF Core global query filters to tenant-scoped entities and stamping tenant IDs on save. Use tenant resolution middleware to capture context and a scoped ITenantProvider to enforce data access boundaries.

What is the difference between database-per-tenant and schema-per-tenant strategies?▼

Database-per-tenant provides physical isolation by using separate databases per tenant, while schema-per-tenant isolates data within separate schemas of a shared database. Both strategies manage per-tenant connection routing differently within your .NET DbContext.

How do I resolve tenant context from JWT claims in ASP.NET Core middleware?▼

Resolve tenant context from JWT claims using ASP.NET Core middleware that extracts tenant identifiers early in the request pipeline. The middleware populates a scoped ITenantProvider, making the tenant context available for downstream dependency injection.

Can I use shared-database multi-tenancy with global EF Core query filters?▼

Yes, shared-database multi-tenancy uses global EF Core query filters to automatically restrict entity queries by tenant ID. This approach prevents cross-tenant data leakage without requiring separate databases or schemas for each tenant.

How do I automate tenant onboarding and database migrations in a multi-tenant .NET app?▼

Automate tenant onboarding in .NET by applying migration and backfill strategies that provision tenant-specific databases or schemas. Route DbContext construction to per-tenant connection strings to execute schema updates during the onboarding process.

When should I not use a shared-database tenancy strategy for my SaaS platform?▼

Avoid shared-database tenancy when tenants require strict physical data isolation or custom schema migrations. Database-per-tenant or schema-per-tenant strategies better serve these needs by preventing operational interference and simplifying per-tenant connection management.

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