using System;

public class ReceiptRequest {

    public long ftReceiptCase {get;set;}

}

​

public static class ReceiptRequestExtensions

{

    public static bool IsVoid(this ReceiptRequest receiptRequest) => (receiptRequest.ftReceiptCase & 0x0000_0000_000F_0000) == 0x0000_0000_0004_0000;

    public static bool IsVoidFixed(this ReceiptRequest receiptRequest) => (receiptRequest.ftReceiptCase & 0x0000_0000_0004_0000) == 0x0000_0000_0004_0000;

}

​

​

public class Program

{

        public static void Main()

        {

        var request = new ReceiptRequest {

            ftReceiptCase = 0x0000_0000_0004_0000 | 0x0000_0000_0001_0000

        };

​

        Console.WriteLine(request.IsVoid());

        Console.WriteLine(request.IsVoidFixed());

    }

}