Linq select self reference during creation in C#

Question

Basically what I want is the same that is answered here but in C#: Self-references in object literal declarations

What I have is this code:

private List<myObject> myFunction()
{
    return myList.Select(l => new myObject
    {
        propA = 6,
        propB = 3,
        propC = propA + propB
    }
    ).ToList();
}

Of course it does not work, because I cannot reference propA and propB this way. What it the right way to do it?

Thank you

Answer 1

You can use body in lambda expression:

private List<myObject> myFunction()
{
    return myList.Select(l => 
    {
        var myObject = new myObject
        {
            propA = 6,
            propB = 3        
        };

        myObject.propC = myObject.propA + myObject.propB;

        return myObject;

    }).ToList();
}

Or you can return sum in getter of propC:

public int propC 
{
    get
    {
        return propA + propB;
    }
}

And you don't need to set propC.