Make checkbox bydefault false in entity data model in mvc

    [Display(Name = "DateOfBirthNone", Order = 435, ResourceType = typeof(Uco.Content.Resources.Models))]
    public virtual bool DateOfBirthNone { get; set; }
    [Display(Name = "DateOfDeathNone", Order = 436, ResourceType = typeof(Uco.Content.Resources.Models))]
    public virtual bool DateOfDeathNone { get; set; }

these are checkboxes in my UI these are by default TRUE. I want to convert these into by default False. what should i do? Suggest me