C# DragDrop & DragEnter

        private void Form1_DragDrop(object sender, DragEventArgs e)
        {
            string[] datas = (string[])e.Data.GetData(DataFormats.FileDrop);            
        }

        private void Form1_DragEnter(object sender, DragEventArgs e)
        {
            e.Effect = e.Data.GetDataPresent(DataFormats.FileDrop) ? DragDropEffects.Copy : DragDropEffects.None;
        }