How to edit an element in the List (Of Strings) The method ( For Each Or Linq)

Question

        Dim lstStt As New List(Of String)
        lstStt.Add("A")
        lstStt.ForEach(Sub(d) d = "") ' No Edit

OR

       For Each d In lstStt
            d = ""  'No Edit
        Next

If such a code is not practical, leave me a comment that this is not possible. thank.

Answer 1

In VB and C# it is not possible to modify the strings (which are “immutable”), but you can replace the items of the list with other values. For example, lstStt(0) = "" will replace the first item with "". To modify more items, use a For loop, or maybe something like this:

Enumerable.Range(0, lstStt.Count).All(Function(i)
                                            lstStt(i) = "" : Return True
                                        End Function)

You can also create a new list:

lstStt = Enumerable.Repeat("", lstStt.Count).ToList