title: Capture screenshot not working properly on different resolution C#
body: <p>I got two different screenshot result on different screen resolution, First I try with 1920*1080(which was my pc default resolution) got zoomed not desired result and later I tried with changing my pc resolution 1280*720 and this time works fine. 
  Here is my sample code:</p>
  
  <pre><code>    private void button1_Click(object sender, EventArgs e)
      {
          Bitmap bmp = new Bitmap(this.ClientRectangle.Width, this.ClientRectangle.Width);
          using (Graphics G = Graphics.FromImage(bmp))
          {
              G.CompositingMode = System.Drawing.Drawing2D.CompositingMode.SourceOver;
              G.CopyFromScreen(this.PointToScreen(new Point(0, 0)), new Point(0, 0), ClientSize);
              double percent = 0.60;
              Color darken = Color.FromArgb((int)(255 * percent), Color.Black);
              using (Brush brsh = new SolidBrush(darken))
              {
                  G.FillRectangle(brsh, this.ClientRectangle);
              }
          }
          saveDialog.FileName = "test";
          saveDialog.DefaultExt = "jpg";
          saveDialog.Filter = "JPG images (*.jpg)|*.jpg";
  
          if (saveDialog.ShowDialog() == DialogResult.OK)
          {
              var fileName = saveDialog.FileName;
              if (!System.IO.Path.HasExtension(fileName) || System.IO.Path.GetExtension(fileName) != "jpg")
                  fileName = fileName + ".jpg";
  
              bmp.Save(fileName, System.Drawing.Imaging.ImageFormat.Jpeg);
          }
      }
  </code></pre>
  
  <p>Image captured on 1920*1080 resolution: <a href="https://i.stack.imgur.com/etJYL.jpg" rel="nofollow noreferrer">zoomed image</a></p>
  
  <p>Image captured on 1280*720 resolution: <a href="https://i.stack.imgur.com/x2g97.jpg" rel="nofollow noreferrer">Fine image</a></p>
  
  <p>How screen resolution affects capturing screenshot? How can I get desired result on my pc default resolution(1920*180)? Please help. Thanks.</p>