Question

I am getting Object reference not set to an instance of an object. exception for the following code. I can prevent this by creating an instance of RequestDetail and then passing ObjectId ot that.

But whats wrong with this code.

class Program
{
    static void Main(string[] args)
    {
        Request header = new Request();
        header.RequestDetail.ObjectId = "12343";

        RequestDetail rd = new RequestDetail();
        rd = header.RequestDetail;

        Console.WriteLine(rd.ObjectId);
    }
}

public class Request
{
    public RequestDetail RequestDetail { get; set; }
}
public class RequestDetail
{
    public string ObjectId { get; set; }
}

Answer 1

Request header = new Request { RequestDetail = new RequestDetail() }

or you can initialize the RequestDetail in the Request constructor as well.