C# SQLite object custom getter and setter

I have a class which is also a table of a database SQLite.

I need to work with dates and I thought the best solution was to work with dates as integers, since in sqlite i don't have date operations. The problem is the following: I'm saving DateTime in my db as int using as helper a DateTime parameters which is ignored by db.

This is my class:

public class MYCLASS : Shared
{
    [PrimaryKey]
    public Guid ID { get; set; }
    [Ignore]
    public DateTime DATA_ORA 
    { 
      get { return DateTime.Parse(this.DATA_ORA_INT.ToString()); } 
      set { this.DATA_ORA_INT = int.Parse(value.ToString("yyyyMMdd")); } 
    }
    private int DATA_ORA_INT { get; set;}
}

I'm having the app terminating without any exception when I set the DATA_ORA field. Why this code is not working?

EDIT:

this is when I got the crush:

MYCLASS transazione = new MYCLASS 
{
    ID = Guid.NewGuid(),
    DATA_ORA = DateTime.Now
};