/// <summary>
        /// Load all the prepared files into cache.
        /// </summary>
        public void LoadPreparedFiles()
        {
            if (m_PreparedFiles == null)
            {
                return;
            }

            if (m_Data == null)
            {
                m_Data = new Dictionary <string, Dictionary <string, string[]> >();
            }

            foreach (KeyValuePair <string, PreparedFileContainer> file in m_PreparedFiles)
            {
                if (file.Value.Columns.Length == 0)
                {
                    Debug.Log("ExternalDataManager : Trying to load file " + file.Key + " but it has no specified column.");
                }
                else if (file.Value.Columns.Length == 1)
                {
                    if (file.Value.Columns[0] == -1)
                    {
                        Dictionary <string, List <string> > loadedData = file.Value.UseAsset ? CSVUtil.LoadAllColumns(file.Value.File) : CSVUtil.LoadAllColumns(file.Value.Path, file.Value.FileName);
                        m_Data.Add(file.Key, loadedData.ConvertValues((obj) => obj.ToArray()));
                    }
                    else
                    {
                        Dictionary <string, List <string> > loadedData = file.Value.UseAsset ? CSVUtil.LoadSingleColumn(file.Value.File, file.Value.Columns[0]) : CSVUtil.LoadSingleColumn(file.Value.Path, file.Value.FileName, file.Value.Columns[0]);
                        m_Data.Add(file.Key, loadedData.ConvertValues((obj) => obj.ToArray()));
                    }
                }
                else
                {
                    Dictionary <string, List <string> > loadedData = file.Value.UseAsset ? CSVUtil.LoadMultipleColumns(file.Value.File, file.Value.Columns) : CSVUtil.LoadMultipleColumns(file.Value.Path, file.Value.FileName, file.Value.Columns);
                    m_Data.Add(file.Key, loadedData.ConvertValues((obj) => obj.ToArray()));
                }
            }

            m_PreparedFiles.Clear();
        }