Hello, may I have your assistance in troubleshooting this C# code in the Visual Studio 2022 IDE:
```
internal void Point(Vector3 worldPos) {
     var viz = GameGui.WorldToScreen(worldPos, out Vector2 screenPos);

     DrawList.PathLineTo(screenPos);
     if (viz) {
          cullObj = false;
     }
}
```
The `WorldToScreen` method returns a `bool` as `true` if the converted coordinates are on screen. The method's declaration is:
```
public bool WorldToScreen(Vector3 worldPos, out Vector2 screenPos)
```
The error I'm receiving is highlighting `GameGui.WorldToScreen` on line two of the provided code and reads `"An object reference is required for the non-static field, method, or property"`
 
I can provide more detail if requested but with all this considered, what are some possible solutions to this compilation error, or alternatively, and preferably, could you direct me to some resources that I can use in order to learn the answer for myself?

Thank you in advance for your time and assistance.
Change book to false