using System; using System.Collections.Generic; using System.ComponentModel.DataAnnotations; using System.Linq; using System.Text; using System.Threading.Tasks; namespace Step.Attributes { public class PositiveNumberAttribute : ValidationAttribute { private double _val; public PositiveNumberAttribute(double val) { _val = val; } protected override ValidationResult IsValid(object value, ValidationContext validationContext) { return ValidationResult.Success; } } }