Is there any way to do this, assign a value within a List.ForEach() statement?

Question

I have this:

var lineArray = line.Split(\';\');

lineArray.ToList().ForEach(x =>
{
    if (x == \"(null)\")
        x = \"NULL\";
    else
        x = string.         


        

Answer 1

I think this small change will work

 var lineArray = line.Split(';').ToList();

        lineArray.ForEach(x =>
        {
            if (x == "(null)")
                x = "NULL";
            else
                x = string.Format("'{0}'", x);
        });

Below is a working example

string line = "a;b;null;c;";

var lineArray = line.Split(';').ToList();

    lineArray.ForEach(x =>
    {
        if (x == "(null)")
            x = "NULL";
        else
            x = string.Format("'{0}'", x);
    });

Result:

If you need just to remove (null) values from the list, you do not need to loop just use removeAll

    lineArray.RemoveAll(a=>a.Equals("(null)"));

working example below