get full filepath of file into Drop in TextBox Control

If I drag and drop a file, which can be audio, video, exe etc etc ... into TextBox Control

How do I get the full path of the file just drop into textBox please ...

so far I have

 private void Form1_Load(object sender, EventArgs e)
            textBox1.AllowDrop = true;

private void textBox1_DragDrop(object sender, DragEventArgs e)
           string[] s = (string[]) e.Data.GetData(DataFormats.FileDrop, false);


 private void textBox1_DragEnter(object sender, DragEventArgs e)
            // Check if the Dataformat of the data can be accepted
            // (we only accept file drops from Explorer, etc.)
            if (e.Data.GetDataPresent(DataFormats.FileDrop))
                e.Effect = DragDropEffects.Copy; // Okay
                e.Effect = DragDropEffects.None; // Unknown data, ignore it