using System.Collections.Generic;
public static void Main()
List<MerchantOrderLine> Lines = null;
List<MerchantOrderLine> LinesNotNull = new List<MerchantOrderLine>()
Tags = new List<OrderTag>()
y.Tag.Equals("FTA", StringComparison.InvariantCultureIgnoreCase) ||
y.Tag.Equals("FTAOnlyForInvoice", StringComparison.InvariantCultureIgnoreCase))) ?? false;
y.Tag.Equals("FTA", StringComparison.InvariantCultureIgnoreCase) ||
y.Tag.Equals("FTAOnlyForInvoice", StringComparison.InvariantCultureIgnoreCase))) ?? false;
Console.WriteLine("Lines NULL, IsFTA: " + IsFta1);
Console.WriteLine("Lines NOT NULL, IsFTA: " + IsFta2);
public class MerchantOrder
public IEnumerable<MerchantOrderLine> Lines { get; set; }
public class MerchantOrderLine
public IEnumerable<OrderTag> Tags { get; set; }
public string Tag { get; set; }