Run Validator Manually on DataAnnotations. Useful when using DataAnnotations in a Non MVC Context, like a console application or a service.

Validate.cs

var objectToValidate = new ObjectToValidate();

var context = new ValidationContext(goUpgradesStandbyProductRequestData, null, null);
var results = new List<ValidationResult>();
bool isValid = Validator.TryValidateObject(objectToValidate, context, results, true);