c# - How to get a Listbox to read to a Listbox -

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i trying open selected textfile , have text input sent listbox... wrote code textbox worked great converting listbox doesnt seem work much. left default item names in order better understanding of going on.

private void button1_click(object sender, eventargs e) {    if (openfiledialog1.showdialog() == system.windows.forms.dialogresult.ok)    {       label1.text = openfiledialog1.filename;       listbox1.items.add = file.readalltext(label1.text);    } } 

listbox1.items.addrange(file.readalllines(label1.text));

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