Mono.Data.Sqlite.SqliteConnection.ExpandFileName C# (CSharp) Method

    private string ExpandFileName(string sourceFile)
    {
      if (String.IsNullOrEmpty(sourceFile)) return sourceFile;

      if (sourceFile.StartsWith(_dataDirectory, StringComparison.OrdinalIgnoreCase))
      {
        string dataDirectory;

#if PLATFORM_COMPACTFRAMEWORK
        dataDirectory = Path.GetDirectoryName(System.Reflection.Assembly.GetCallingAssembly().GetName().CodeBase);
#else
        dataDirectory = AppDomain.CurrentDomain.GetData("DataDirectory") as string;
        if (String.IsNullOrEmpty(dataDirectory))
          dataDirectory = AppDomain.CurrentDomain.BaseDirectory;
#endif

        if (sourceFile.Length > _dataDirectory.Length)
        {
          if (sourceFile[_dataDirectory.Length] == Path.DirectorySeparatorChar ||
              sourceFile[_dataDirectory.Length] == Path.AltDirectorySeparatorChar)
            sourceFile = sourceFile.Remove(_dataDirectory.Length, 1);
        }
        sourceFile = Path.Combine(dataDirectory, sourceFile.Substring(_dataDirectory.Length));
      }

#if !PLATFORM_COMPACTFRAMEWORK
      sourceFile = Path.GetFullPath(sourceFile);
#endif

      return sourceFile;
    }