title: Form Location and Size behaviour
body: <p>I want to position Form on top left corner of the screen. </p>
  
  <p>I have tried <code>this.Location = new Point(0,0)</code> but window is positioned at (7,0) - top of the window is on top of the screen but left side is 7 pixels from the screen edge. 
  I created new WinForms app for testing and added only this code:</p>
  
  <pre><code>private void Form1_Load(object sender, EventArgs e)
  {
      Point p = new Point(0, 0);
  
      WindowState = FormWindowState.Maximized;
      Debug.WriteLine("\nMaximized");
      Debug.WriteLine("Location: " + Location);
      Debug.WriteLine("Size: " + Size);
      Debug.WriteLine("PointToScreen(0,0): " + PointToScreen(p));
  
      WindowState = FormWindowState.Normal;
      Location = p;            
      Debug.WriteLine("\nNormal");
      Debug.WriteLine("Location: " + Location);
      Debug.WriteLine("Size: " + Size);
      Debug.WriteLine("PointToScreen(0,0): " + PointToScreen(p));
  
      Debug.Write("\nScreen.PrimaryScreen.WorkingArea: ");
      Debug.WriteLine(Screen.PrimaryScreen.WorkingArea);
  }
  </code></pre>
  
  <p>The output is:</p>
  
  <pre><code>Maximized  
  Location: {X=-8,Y=-8}  
  Size: {Width=1936, Height=1056}
  PointToScreen(0,0): {X=0,Y=23}
  
  Normal
  Location: {X=0,Y=0}
  Size: {Width=300, Height=300}
  PointToScreen(0,0): {X=8,Y=31}
  
  Screen.PrimaryScreen.WorkingArea: {X=0,Y=0,Width=1920,Height=1040}
  </code></pre>
  
  <p>Why <code>Location = new Point(0,0)</code> doesn't position form on (0,0)?
  Is this due to something on my system? I have Win10 and VS2015. Taskbar is on the bottom, there is nothing on the left side of my desktop.
  In order to position it on (0,0) I actually have to position it on (-7,0). Also, reported width of the maximized form is 16 pixels larger than screen width. I understand that because of window edges, title bar etc there is a difference between client area size and form size, but this is not it. When the form is maximized there are no left and right edges (client area width = desktop width) but form width is +16px. There is +8px on each of the 4 sides of the form but Y position is OK. Why is Y-position OK and X is not?</p>