Entity Framework插入数据报错：Validation failed for one or more entities. See 'EntityValidationErrors' property for more details.

        try
        {
            db.Entity.Add(entity);
            db.SaveChanges();
        }
        catch (DbEntityValidationException dbEx)
        {
            foreach (var validationErrors in dbEx.EntityValidationErrors)
            {
                foreach (var validationError in validationErrors.ValidationErrors)
                {
                    System.Console.WriteLine("Property: {0} Error: {1}", validationError.PropertyName, validationError.ErrorMessage);
                }
            }
        }