using System;
using System.IO;
using System.Collections.Generic;

public static class ClipboardFusionHelper
{
    private static readonly string FilePath = @"C:\ListSearch.txt"; // Change to your path. Insert each string on a new line

    public static string ProcessText(string text)
    {
        string clipText = text.Trim();

        if (File.Exists(FilePath))
        {
            var watchList = new HashSet<string>(
                File.ReadLines(FilePath),
                StringComparer.OrdinalIgnoreCase);
                
            // Check if clipboard contains one of the values
            if (watchList.Contains(clipText))
            {
                BFS.Application.Start(@"C:\ListAlert.txt");  // Change to your path.
            }
        }

        return text;
    }
}