ASP.NET Core Web API Interview Question #37

What is ValidationProblemDetails?

DTOs, Model Binding, Validation & API Responses Junior Beginner

Quick Interview Answer

ValidationProblemDetails is a standardized error representation used to describe validation failures. It contains fields associated with the Problem Details format plus a collection of validation errors.

Detailed Explanation

Using a predictable validation-error shape makes client development easier because consumers can process errors consistently instead of parsing arbitrary strings.

Code Example

{
  "type": "https://tools.ietf.org/html/rfc9110#section-15.5.1",
  "title": "One or more validation errors occurred.",
  "status": 400,
  "errors": {
    "Name": [ "The Name field is required." ]
  }
}