How to find out the correct screen resolution in C#?

Question

C++ / C#

I need to get the screen resolution for a screenshot, but when I try to get the resolution this way:

System.Windows.Forms.Screen.PrimaryScreen.Bounds.Size

It gives me a resolution:
864x1536
although my resolution is 1080x1980.

Answer 1

AlexanderProkopenko ,
an example from
https://www.codeproject.com/Articles/6810/Dynamic-...
despite its venerable age
it works, you may have to upgrade the project (it's easy) from the author's code
as described in
https://www. pinvoke.net/default.aspx/user32.enumdi... :

[DllImport("user32.dll")]
  public static extern int EnumDisplaySettings(string deviceName, int modeNum, ref DEVMODE1 devMode);
public struct DEVMODE1 {
  [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 32)] public string dmDeviceName;
// детали
DEVMODE1 dm = new DEVMODE1();
User_32.EnumDisplaySettings(null, User_32.ENUM_CURRENT_SETTINGS, ref dm)) ;