Unity从外部读取txt文件

unity 从StreamingAssets文件夹内读取文件并，需在Assets文件夹下创建StreamingAssets文件夹，将txt配置文件放在StreamingAssets文件夹中。

//读取配置文件
private string ReadStreamingAsset(string fileName)
{
    string result = "";
    string path = Application.streamingAssetsPath + "/" + fileName;

    if (File.Exists(path))
    {
        StreamReader reader = new StreamReader(path);
        result = reader.ReadToEnd();
        reader.Close();
    }

    return result;
}