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    <p>The answer provided by VVS was a great help! I found two minor issues with it though, so I am reposting the bulk of his code with these revisions:</p> <p>(1) The very first time the application runs, the form is opened in a Normal state but is sized such that it appears as just a title bar. I added a conditional in the constructor to fix this.</p> <p>(2) If the application is closed while minimized or maximized the code in OnClosing fails to remember the dimensions of the window in its Normal state. (The 3 lines of code--which I have now commented out--seems reasonable but for some reason just does not work.) Fortunately I had previously solved this problem and have included that code in a new region at the end of the code to track window state as it happens rather than wait for closing.</p> <hr> <p>With these two fixes in place, I have tested:</p> <p>A. closing in normal state--restores to same size/position and state</p> <p>B. closing in minimized state--restores to normal state with last normal size/position</p> <p>C. closing in maximized state--restores to maximized state and remembers its last size/position when one later adjusts to normal state.</p> <p>D. closing on monitor 2--restores to monitor 2.</p> <p>E. closing on monitor 2 then disconnecting monitor 2--restores to same position on monitor 1</p> <p>David: your code allowed me to achieve points D and E almost effortlessly--not only did you provide a solution for my question, you provided it in a complete program so I had it up and running almost within seconds of pasting it into Visual Studio. So a big thank you for that!</p> <pre><code>public partial class MainForm : Form { bool windowInitialized; public MainForm() { InitializeComponent(); // this is the default this.WindowState = FormWindowState.Normal; this.StartPosition = FormStartPosition.WindowsDefaultBounds; // check if the saved bounds are nonzero and visible on any screen if (Settings.Default.WindowPosition != Rectangle.Empty &amp;&amp; IsVisibleOnAnyScreen(Settings.Default.WindowPosition)) { // first set the bounds this.StartPosition = FormStartPosition.Manual; this.DesktopBounds = Settings.Default.WindowPosition; // afterwards set the window state to the saved value (which could be Maximized) this.WindowState = Settings.Default.WindowState; } else { // this resets the upper left corner of the window to windows standards this.StartPosition = FormStartPosition.WindowsDefaultLocation; // we can still apply the saved size // msorens: added gatekeeper, otherwise first time appears as just a title bar! if (Settings.Default.WindowPosition != Rectangle.Empty) { this.Size = Settings.Default.WindowPosition.Size; } } windowInitialized = true; } private bool IsVisibleOnAnyScreen(Rectangle rect) { foreach (Screen screen in Screen.AllScreens) { if (screen.WorkingArea.IntersectsWith(rect)) { return true; } } return false; } protected override void OnClosed(EventArgs e) { base.OnClosed(e); // only save the WindowState if Normal or Maximized switch (this.WindowState) { case FormWindowState.Normal: case FormWindowState.Maximized: Settings.Default.WindowState = this.WindowState; break; default: Settings.Default.WindowState = FormWindowState.Normal; break; } # region msorens: this code does *not* handle minimized/maximized window. // reset window state to normal to get the correct bounds // also make the form invisible to prevent distracting the user //this.Visible = false; //this.WindowState = FormWindowState.Normal; //Settings.Default.WindowPosition = this.DesktopBounds; # endregion Settings.Default.Save(); } # region window size/position // msorens: Added region to handle closing when window is minimized or maximized. protected override void OnResize(EventArgs e) { base.OnResize(e); TrackWindowState(); } protected override void OnMove(EventArgs e) { base.OnMove(e); TrackWindowState(); } // On a move or resize in Normal state, record the new values as they occur. // This solves the problem of closing the app when minimized or maximized. private void TrackWindowState() { // Don't record the window setup, otherwise we lose the persistent values! if (!windowInitialized) { return; } if (WindowState == FormWindowState.Normal) { Settings.Default.WindowPosition = this.DesktopBounds; } } # endregion window size/position } </code></pre>
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    1. COFor those interested in actually using this solution, I have taken the final step of converting the example into a library with a documented API (http://cleancode.sourceforge.net/api/csharp/CleanCode.Forms.WindowRestorer.html). With the library, you need only a couple lines to load/save settings, and a couple one-line event handlers--a total of 7 lines of code for everything! Download area is at http://cleancode.sourceforge.net/wwwdoc/download.html.
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    2. COAny Idea why I would get a StackOverflow error on the `base.OnMove()`???
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    3. COPerhaps the problem with my code is that I shouldn't make the window invisible before changing the state. Perhaps I just should test it instead of guessing :)
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