C# initialize list property [closed]

Answer 1

The default value for any reference type is null. So I assume you're getting a NullReferenceException when you try to add values. You can initialize your list property to an empty list in the object's constructor:

public class RootObject
{
    public List inchistory { get; set; }

    public RootObject()
    {
        inchistory = new List();
    }
}

Now any instance of RootObject will have a valid (empty) list by default, allowing you to add to it:

Rootobject robj = new Rootobject();
robj.inchistor.Add(someInstanceOfInchistory);