RatioMaster_source.RM.Form1_DragEnter C# (CSharp) Method

        internal void Form1_DragEnter(object sender, DragEventArgs e)
        {
            if (e.Data.GetDataPresent(DataFormats.FileDrop) || e.Data.GetDataPresent(DataFormats.Text) || e.Data.GetFormats().ToString().Equals("System.String[]"))
            {
                e.Effect = DragDropEffects.All;
            }
            else
            {
                e.Effect = DragDropEffects.None;
            }
        }