Yeah. Just now I tried making another script that only creates a HashSet variable, but even this doesn't seem to work for some reason.

using System.Collections.Generic;
using ScriptPortal.Vegas;public class EntryPoint{
    Vegas currentVegasApp;
    public void FromVegas(Vegas vegas){
        HashSet<int> noDuplicatesList = new HashSet<int>();
    }
}

Out of curiosity, what if you change it to:

using System.Collections.Generic;
using ScriptPortal.Vegas;
public class EntryPoint
{
    Vegas currentVegasApp;
    public void FromVegas(Vegas vegas)
    {
        System.Collections.Generic.HashSet<int> noDuplicatesList = new System.Collections.Generic.HashSet<int>();
    }
}

This time;

The type or namespace name 'HashSet' does not exist in the namespace 'System.Collections.Generic' (are you missing an assembly reference?)

Incidentally, not sure what happened with the code snippet I pasted in my earlier comment. I had line breaks in my original code but whatever.

The "insert code" on this forum does that sometimes. I'm used to seeing that happen.

What are you editing in? Or are you just using something like NotePad and then running it in VEGAS? In Visual Studio, it was happy with adding "System.Collections.Generic." in front of "HashSet" while set to ".NET 4.0" but I did not try running it in VEGAS. I have found that, sometimes, you have to specify where the item is located as the same item can be in multiple places. That's why I thought it might be helpful to specify.

Yeah, I was just typing into Notepad and running the code in Vegas. I tried using Visual Studio in the past but it was very confusing for me. Do you think creating the code in Visual Studio vs. in Notepad would make any difference for how it runs in Vegas?

If running as straight text, probably not. If running a compiled DLL, maybe. Go take a look at all of the tutorials on my website at www.jetdv.com and it will show you how to get started using Visual Studio for writing scripts for VEGAS. Here's a good starting point:

http://www.jetdv.com/2021/01/31/what-is-scripting/

Or you can also go straight to the YouTube channel - here's the VEGAS playlist:

As I said, I've never tried using HashSet and haven't tested it either.

Create the text file yourscriptname.cs.settings with the following content:

<?xml version="1.0" encoding="UTF-8" ?>
<ScriptSettings>
  <AssemblyReference>System.Core.dll</AssemblyReference>
</ScriptSettings>

The configuration file must be in the same directory as your script.

After adding the *.settings file, I'm still getting the same error message;

The type or namespace name 'HashSet' does not exist in the namespace 'System.Collections.Generic' (are you missing an assembly reference?)

It works here. Check the name of the settings file. If your script is MyScript.cs, the name of the settings file must be MyScript.cs.settings (double extension)

I have done this. I just recorded a video of my process.