тогда видимо либо отслеживать эти размеры с самого рождения формы, что довольно суетно:
| Код |
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
normalBounds = Bounds; // -1 for Left/Top means not assigned or position is system defined
}
private Rectangle normalBounds;
private void Form1_SizeChanged(object sender, EventArgs e)
{
if (WindowState == FormWindowState.Normal)
{
normalBounds = Bounds;
}
}
private void Form1_LocationChanged(object sender, EventArgs e)
{
if (WindowState == FormWindowState.Normal)
{
normalBounds = Bounds;
}
}
}
|
либо Win32 API + GetWindowPlacement + rcNormalPosition, что невыносимо.. т.е. непереносимо.. т.е. некрасиво 
| Код |
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
public Rectangle NormalBounds
{
get
{
NativeMethods.WINDOWPLACEMENT placement = new NativeMethods.WINDOWPLACEMENT();
placement.length = Marshal.SizeOf(typeof(NativeMethods.WINDOWPLACEMENT));
NativeMethods.GetWindowPlacement(this.Handle, ref placement);
return Rectangle.FromLTRB(
placement.rcNormalPosition.left,
placement.rcNormalPosition.top,
placement.rcNormalPosition.right,
placement.rcNormalPosition.bottom
);
}
}
}
static class NativeMethods
{
[DllImport("user32.dll")]
public static extern bool GetWindowPlacement(IntPtr hWnd,
ref WINDOWPLACEMENT lpwndpl);
public struct POINT
{
public int x;
public int y;
}
public struct RECT
{
public int left;
public int top;
public int right;
public int bottom;
}
public struct WINDOWPLACEMENT
{
public int length;
public int flags;
public int showCmd;
public POINT ptMinPosition;
public POINT ptMaxPosition;
public RECT rcNormalPosition;
}
}
|
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)