private bool SameValues(ExpiryDates ExpiryDates1, ExpiryDates ExpiryDates2)
    {
        //Assume they are the same value and the look for differences
        bool result = true;

        if (ExpiryDates1.PSL_ExpiryDate.HasValue != ExpiryDates2.PSL_ExpiryDate.HasValue)
        {
            result = false;
        }

        if (ExpiryDates1.MNL_ExpiryDate.HasValue != ExpiryDates2.MNL_ExpiryDate.HasValue)
        {
            result = false;
        }

        if ((ExpiryDates1.MNL_ExpiryDate != null) && (ExpiryDates2.MNL_ExpiryDate != null))
            if (ExpiryDates1.MNL_ExpiryDate.Value != ExpiryDates2.MNL_ExpiryDate.Value)
                result = false;

        if ((ExpiryDates1.PSL_ExpiryDate != null) && (ExpiryDates2.PSL_ExpiryDate != null))
            if (ExpiryDates1.PSL_ExpiryDate.Value != ExpiryDates2.PSL_ExpiryDate.Value)
                result = false;

        return result;
    }

public class ExpiryDates
{
    public DateTime? MNL_ExpiryDate { get; set; }
    public DateTime? PSL_ExpiryDate { get; set; }
}