C#: Get complete desktop size?

Question

How do I find out the size of the entire desktop? Not the "working area" and not the "screen resolution", both of which refer to only one screen. I want to find out the total width and height of the virtual desktop of which each monitor is showing only a part.

Answer 1

You have two options:

1. PresentationFramework.dll

   SystemParameters.VirtualScreenWidth    SystemParameters.VirtualScreenHeight 

2. System.Windows.Forms.dll

   SystemInformation.VirtualScreen.Width    SystemInformation.VirtualScreen.Height 

Use the first option if you developing a WPF application.

Answer 2

I think it's time to bring this answer up to date with a little LINQ, which makes it easy to get the entire desktop size with a single expression.

Console.WriteLine(     Screen.AllScreens.Select(screen=>screen.Bounds)     .Aggregate(Rectangle.Union)     .Size ); 

My original answer follows:

---

I guess what you want is something like this:

int minx, miny, maxx, maxy; minx = miny = int.MaxValue; maxx = maxy = int.MinValue;  foreach(Screen screen in Screen.AllScreens){     var bounds = screen.Bounds;     minx = Math.Min(minx, bounds.X);     miny = Math.Min(miny, bounds.Y);     maxx = Math.Max(maxx, bounds.Right);     maxy = Math.Max(maxy, bounds.Bottom); }  Console.WriteLine("(width, height) = ({0}, {1})", maxx - minx, maxy - miny); 

Keep in mind that this doesn't tell the whole story. It is possible for multiple monitors to be staggered, or arranged in a nonrectangular shape. Therefore, it may be that not all of the space between (minx, miny) and (maxx, maxy) is visible.

EDIT:

I just realized that the code could be a bit simpler using Rectangle.Union:

Rectangle rect = new Rectangle(int.MaxValue, int.MaxValue, int.MinValue, int.MinValue);  foreach(Screen screen in Screen.AllScreens)     rect = Rectangle.Union(rect, screen.Bounds);  Console.WriteLine("(width, height) = ({0}, {1})", rect.Width, rect.Height);