ChangeString() публичный Метод

Change strings of items to the stored 'newString' value. Optional you may use your own 'newString' parameter.
public ChangeString ( string stringToChange, string newString = "" ) : string
stringToChange string
newString string "Change the found values to 'neString'."
Результат string
        private void btnChange_Click(object sender, EventArgs e)
        {
            if (_fr.Index >= 0)
            {
                FindAndReplaceItem item = _fr.LItems[_fr.Index];
                item.Name        = _fr.ChangeString(item.Name, txtTo.Text);
                item.Description = _fr.ChangeString(item.Description, txtTo.Text);
                item.Stereotype  = _fr.ChangeString(item.Stereotype, txtTo.Text);
                // update form
                rtfName.Text       = item.Name;
                rtfNotes.Text      = item.Description;
                rtfStereotype.Text = item.Stereotype;

                //
                if (_fr.IsTagSearch && (gridTags != null))
                {
                    gridTags.DataSource = null;
                    //FindAndReplaceItemElement itemEl = (FindAndReplaceItemElement)item;
                    foreach (FindAndReplaceItemTag tag in item.LItemTag)
                    {
                        tag.Value = _fr.ChangeString(tag.Value, txtTo.Text);
                    }
                    gridTags.AutoGenerateColumns = false;
                    gridTags.DataSource          = item.LItemTag;
                }
            }
            txtState.Text = StateCurrentItem() + @" changed temporary, store if you want it permanently.";
        }
        private void btnChangeAll_Click(object sender, EventArgs e)
        {
            foreach (FindAndReplaceItem frItem in _fr.l_items)
            {
                frItem.Name        = _fr.ChangeString(frItem.Name, txtTo.Text);
                frItem.Description = _fr.ChangeString(frItem.Description, txtTo.Text);
                frItem.save(_fr.rep, _fr.searchFieldType);
            }

            ShowItem();
            txtState.Text = StateCurrentItem() + " all found items changed.";
        }