Converts save data from The Stanley Parable: Ultra Deluxe into JSON (and vice versa)

TSPUD_Save_Converter.cs

using System;
using System.Diagnostics;
using System.Text;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

class Program {
  public static String EncSec = "saRpmZ6mMgZpmcojUkvkyGEQGez9YkWoXZfJdRc9ZmmJrCzfM8JksVxQfQK8uBBs";
  
  public static void Main (string[] args) {
    Console.WriteLine("ALWAYS MAKE BACKUPS!!!");
    bool InputLoop = true;
    while (InputLoop) {
      Console.WriteLine(
        "What do you want to do?" + "\n" +
        "(1) - Convert to JSON" + "\n" +
        "(2) - Convert to save data"
      );
      string input = Console.ReadLine();
      if (input == "1") {
        InputLoop = false;
        ToJSON();
      }
      else if (input == "2") {
        InputLoop = false;
        ToSave();
      }
      else Console.WriteLine("Incorrect input!");
    }
  }

  public static void ToJSON () {
    Stopwatch msw = new Stopwatch();
    Stopwatch sw = new Stopwatch();
    Console.WriteLine("Reading File...");
    msw.Start();
    sw.Start();
    
    string data = System.IO.File.ReadAllText("tspud-savedata.txt");
    
    sw.Stop();
    Console.WriteLine("Took {0}. Decrypting...", sw.Elapsed);
    sw.Reset();
    sw.Start();
    
    StringBuilder _sb = new StringBuilder();
    // From: https://github.com/richardelms/FileBasedPlayerPrefs/blob/master/Runtime/FBPP.cs#L277
    for (int i = 0; i < data.Length; i++) {
      _sb.Append((char)(data[i] ^ EncSec[i % EncSec.Length]));
    }
    string json = _sb.ToString();
    
    sw.Stop();
    Console.WriteLine("Took {0}. Prettying up...", sw.Elapsed);
    sw.Reset();
    sw.Start();
    
    // Parse
    JObject obj = JObject.Parse(json);
    // Get the StringData and convert it to an object
    // (This is to pretty it up since it's initially in a string)
    String StrData = (String) obj["StringData"][0]["Value"];
    obj["StringData"][0]["Value"] = JObject.Parse(StrData);
    // Convert + Format
    string pjson = JsonConvert.SerializeObject(
      obj,
      Formatting.Indented
    );
    
    sw.Stop();
    Console.WriteLine("Took {0}. Writing...", sw.Elapsed);
    sw.Reset();
    sw.Start();
    
    System.IO.File.WriteAllText("tspud-savedata.json", pjson);
    
    sw.Stop();
    msw.Stop();
    Console.WriteLine("Took {0}. Total operation took {1}.", sw.Elapsed, msw.Elapsed);
    Console.WriteLine("Your file is in tspud-savedata.json!");
  }

  public static void ToSave() {
    Stopwatch msw = new Stopwatch();
    Stopwatch sw = new Stopwatch();
    Console.WriteLine("Reading File...");
    msw.Start();
    sw.Start();

    string json = System.IO.File.ReadAllText("tspud-savedata.json");

    sw.Stop();
    Console.WriteLine("Took {0}. De-prettying...", sw.Elapsed);
    sw.Reset();
    sw.Start();

    JObject obj = JObject.Parse(json);
    // Assuming that the save data came from this tool,
    // and thus converting the object back into a string.
    JObject StrData = (JObject) obj["StringData"][0]["Value"];
    obj["StringData"][0]["Value"] = JsonConvert.SerializeObject(StrData);
    string raw = JsonConvert.SerializeObject(obj);

    sw.Stop();
    Console.WriteLine("Took {0}. Encrypting...", sw.Elapsed);
    sw.Reset();
    sw.Start();

    StringBuilder _sb = new StringBuilder();
    // From: https://github.com/richardelms/FileBasedPlayerPrefs/blob/master/Runtime/FBPP.cs#L277
    for (int i = 0; i < raw.Length; i++) {
      _sb.Append((char)(raw[i] ^ EncSec[i % EncSec.Length]));
    }
    string data = _sb.ToString();

    sw.Stop();
    Console.WriteLine("Took {0}. Writing...", sw.Elapsed);
    sw.Reset();
    sw.Start();

    System.IO.File.WriteAllText("tspud-savedata.txt", data);
    
    sw.Stop();
    msw.Stop();
    Console.WriteLine("Took {0}. Total operation took {1}.", sw.Elapsed, msw.Elapsed);
    Console.WriteLine("Your file is in tspud-savedata.txt!");
  }
}

Online (repl): https://replit.com/@TylerFlowers/TSPUD-Save-Converter