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private void ListBox_DragEnter(object sender, DragEventArgs e)
{
if (e.Data.GetDataPresent(DataFormats.FileDrop, false) == true)
e.Effects = DragDropEffects.All;
}
private void ListBox_Drop(object sender, DragEventArgs e)
{
string[] files = (string[])e.Data.GetData(DataFormats.FileDrop);
foreach (string file in files)
{
listBox1.Items.Add(file);
}
}