oap_labs/model/Class1.cs

using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using static WpfAppA.model.Globals;
using System.Threading.Tasks;
using System.Runtime.Serialization;

namespace WpfAppA.model
{
    [DataContract]
    public class Hero
    {
        [DataMember]
        public string name { get; set; }
        [DataMember]
        public int Age { get; set; }
        [DataMember]
        public string power { get; set; }
        [DataMember]
        public string race { get; set; }

        [DataMember(Name = "dateOfLastVaccination")]
        private string? stringDate { get; set; }

        [IgnoreDataMember]
        public DateTime? dateOfLastVaccination
        {
            get
            {
                return stringDate == null ? null : DateTime.Parse(stringDate);
            }
            set
            {
                stringDate = value.ToString();
            }
        }
    }
}