Converts a string table from an uexp file (UE4.23) to a CSV file

ST2CSV.cs

using System.Text;

var filePath = @"ST_xxxx.uexp";
var outputPath = @"ST_xxxx.csv";

// Open file read only
using var fsRead = File.Open(filePath, FileMode.Open, FileAccess.Read);
using var br = new BinaryReader(fsRead);

// gloss over the header
fsRead.Seek(0xc, SeekOrigin.Begin);

// ST name length: 
var nameLen = br.ReadInt32();
var name = br.ReadBytes(nameLen);

// number of entries in ST:
var entries = br.ReadInt32();
Dictionary<string, string> contents = new Dictionary<string, string>();
for (int i = 0; i < entries; i++)
{
    var len = br.ReadInt32();
    var id = br.ReadBytes(len);
    len = br.ReadInt32();
    var value = br.ReadBytes(len);

    contents.Add(Encoding.UTF8.GetString(id, 0, id.Length - 1), Encoding.UTF8.GetString(value, 0, value.Length - 1));
}

br.Close();

// now convert dictionary to CSV output
using var output = new StreamWriter(outputPath);

// header
output.WriteLine("ID;Text");

foreach (var item in contents)
{
    output.WriteLine($"{item.Key};{item.Value}");
}