---
title: "Protect Your Entities with Domain Validation"
url: https://daily.dev/posts/protect-your-entities-with-domain-validation-rha9t8ic8
source_url: https://www.telerik.com/blogs/protect-entities-domain-validation
type: article
source: "Telerik"
published: 2026-05-19T13:49:17.540Z
updated: 2026-05-19T14:05:03.671Z
tags: ["c#", "aspnet", "domain-driven-design"]
reading_time: 8
upvotes: 3
comments: 0
language: en
---

> ## Documentation Index
> Fetch the complete documentation index at: https://daily.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Protect Your Entities with Domain Validation

**[Telerik](https://daily.dev/sources/telerik)** · 8 min read · 3 upvotes · 0 comments

## Summary

Domain validation in ASP.NET Core is often misplaced in controllers, services, or via DataAnnotations, leading to fragile systems where entities can exist in invalid states. Following Domain-Driven Design principles, validations should live inside the domain entities themselves — using private setters, read-only collections, constructor-enforced invariants, and custom DomainException classes. This approach makes entities self-protecting, prevents corrupted data from reaching the database, and keeps business rules co-located with the concepts they govern. FluentValidation still has a role for validating input data at the boundary, while controllers and services handle security, authorization, and cross-aggregate flow checks.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://www.telerik.com/blogs/protect-entities-domain-validation>

## Similar posts on daily.dev

- [What Invariants Are \(and Why a Domain Model Is the Best Place to Enforce Them\)](https://daily.dev/posts/what-invariants-are-and-why-a-domain-model-is-the-best-place-to-enforce-them--jqweafvd0) · Milan Jovanović · 12 upvotes · 0 comments

---

Tags: [#c#](https://daily.dev/tags/c#), [#aspnet](https://daily.dev/tags/aspnet), [#domain-driven-design](https://daily.dev/tags/domain-driven-design)

[View this post on daily.dev](https://daily.dev/posts/protect-your-entities-with-domain-validation-rha9t8ic8)