ScreenToGif.Modern.timerCapture_Tick C# (CSharp) Method

        private void timerCapture_Tick(object sender, EventArgs e)
        {
            //Get the actual position of the form.
            var lefttop = new Point(this.Location.X + panelTransparent.Location.X, this.Location.Y + panelTransparent.Location.Y);
            //Take a screenshot of the area.
            _gr.CopyFromScreen(lefttop.X, lefttop.Y, 0, 0, panelTransparent.Bounds.Size, CopyPixelOperation.SourceCopy);
            //Add the bitmap to a list
            _addDel.BeginInvoke(String.Format("{0}{1}.bmp", _pathTemp, _frameCount), new Bitmap(_bt), CallBack, null);

            this.Invoke((Action)(() => this.Text = String.Format("Screen To Gif • {0}", _frameCount)));

            _frameCount++;
            GC.Collect(1);
        }