<PackageReference Include="System.Drawing.Common" Version="10.0.4" />

Windows.Win32.Foundation.RECT

struct RECT
The RECT structure defines a rectangle by the coordinates of its upper-left and lower-right corners.
namespace Windows.Win32.Foundation { internal struct RECT { public RECT(Size size); public static implicit operator Rectangle(RECT value); public static implicit operator RectangleF(RECT value); public static implicit operator RECT(Rectangle value); } }