How to reverse colors in an EXE app using VB (or code compatible with EXE)

[Winston]

I'm trying to either invert the color picture without brightness affected, or rotate color hue by 180. With no success looking that up, I tried this;
        Dim grayscale As New Imaging.ColorMatrix(New Single()() _
    {
        New Single() {0, 0.5, 0.5, 0, 0},
        New Single() {0.5, 0, 0.5, 0, 0},
        New Single() {0.5, 0.5, 0, 0, 0},
        New Single() {0, 0, 0, 1, 0},
        New Single() {0, 0, 0, 0, 1}
    })
Colors were very lossy. I look for a way to restore or double Saturation after doing this. Nothing on the internet was working, and I need something like a toggle button that can reverse colors without or very small color loss and can be repeated.

Help? (And yes, combining what I am looking for and Invert would result in an image inverted without changing color.)

[Winston]

While I wait for a reply, I tested this in GIMP by using "Colors/Components/Channel Mixer", but this again won't do, this time because it becomes too saturated. However, that was GIMP. This code is written for similar effect in Visual Studio code:
       Dim grayscale As New Imaging.ColorMatrix(New Single()() _
    {
        New Single() {-0.5, 1, 1, 0, 0},
        New Single() {1, -0.5, 1, 0, 0},
        New Single() {1, 1, -0.5, 0, 0},
        New Single() {0, 0, 0, 1, 0},
        New Single() {0, 0, 0, 0, 1}
    })
Please reply soon, I have waited several hours with no response.

[Winston]

On 6/23/2021 at 1:48 AM, Winston said:

While I wait for a reply, I tested this in GIMP by using "Colors/Components/Channel Mixer", but this again won't do, this time because it becomes too saturated. However, that was GIMP. This code is written for similar effect in Visual Studio code:
       Dim grayscale As New Imaging.ColorMatrix(New Single()() _
    {
        New Single() {-0.5, 1, 1, 0, 0},
        New Single() {1, -0.5, 1, 0, 0},
        New Single() {1, 1, -0.5, 0, 0},
        New Single() {0, 0, 0, 1, 0},
        New Single() {0, 0, 0, 0, 1}
    })
Please reply soon, I have waited several hours with no response.

I might have meant for the 5th on to be {1, 1, 1, 0, 1}, but again, I could be mistaken.