GetDC returns HDC but it should return a SafeHandle that calls ReleaseDC

I would also really love to have a public HWnd property on the safe handle. It should be stored in the safe handle anyway in order to call ReleaseDC, and it's also very useful in cases like this:

windowDC.Dispose();
windowDC = User32.GetDC(windowDC.HWnd);

The current workaround is to say new ReleaseDCSafeHandle(hwnd, PInvoke.GetDC(hwnd)) instead of PInvoke.GetDC(hwnd):

internal sealed class ReleaseDCSafeHandle : DeleteDCSafeHandle
{
    public ReleaseDCSafeHandle(HWND hWnd, IntPtr handle)
        : base(handle)
    {
        HWnd = hWnd;
    }

    public HWND HWnd { get; }

    protected override bool ReleaseHandle() => ReleaseDC(HWnd, handle);

    /// <summary>
    /// <seealso href="https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-releasedc"/>
    /// </summary>
    [DllImport("user32.dll")]
    private static extern bool ReleaseDC(HWND hWnd, IntPtr hDC);
}

Start by tracing the generated User32.GetDC entry point and the existing ReleaseDCSafeHandle workaround shown in the issue. Check how the returned handle is disposed and how ReleaseDC receives the window handle; done means GetDC returns a safe handle with a public HWnd property and disposal releases the DC correctly.