Provide a way to customize the default validation message

[marcominerva]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

When we get a validation error in .NET 10 Preview 3, we obtain something like this:

{
  "title": "One or more validation errors occurred.",
  "errors": {
    "Id": [
      "The field Id must be between 1 and 10."
    ]
  }
}

If a multi-language service, we can easily customize the error message for each property using resource files. However, currently we don't have a way to change the title property (One or more validation errors occurred.).

Expected Behavior

We should be able to change the value of the title property, for example to support multi-language scenarios.

.NET Version

10.0.100-preview.3.25201.16