Generic List - moving an item within the list

Question

So I have a generic list, and an oldIndex and a newIndex value.

I want to move the item at oldIndex, to newIndex.

Answer 1

Is more simple guys just do this

    public void MoveUp(object item,List Concepts){

        int ind = Concepts.IndexOf(item.ToString());

        if (ind != 0)
        {
            Concepts.RemoveAt(ind);
            Concepts.Insert(ind-1,item.ToString());
            obtenernombres();
            NotifyPropertyChanged("Concepts");
        }}

Do the same with MoveDown but change the if for "if (ind !=Concepts.Count())" and the Concepts.Insert(ind+1,item.ToString());