A simple example of a screenshot of the c control

First select the path to save the image:

saveFileDialog1.Title = " save ";
            saveFileDialog1.Filter = "*.png|*.png";
            saveFileDialog1.RestoreDirectory = true;
            if (saveFileDialog1.ShowDialog() == DialogResult.OK)
            {
                timer1.Enabled = true;
            }

Next, save the control picture (to wait for the savedialoge control to close completely, use timer to delay) :

timer1.Enabled = false;
            Bitmap bit = new Bitmap(this.Width, this.Height);// instantiation 1 With the form 1 The sample of bitmap
            Graphics g = Graphics.FromImage(bit);
            g.CompositingQuality = CompositingQuality.HighQuality;// The mass is set to the highest 
            //g.CopyFromScreen(this.Left, this.Top, 0, 0, new Size(this.Width, this.Height));// Save the entire form as a picture 
            g.CopyFromScreen(chartType.PointToScreen(Point.Empty), Point.Empty, chartType.Size);// Save only one control 
            bit.Save(saveFileDialog1.FileName);// The default save format is PNG , save into jpg The format quality is not very good 
            if (File.Exists(saveFileDialog1.FileName.ToString()))
            {
                MessageBox.Show(" Screenshot successful! ");
                return;
            }