Activate Unity with the specified serial key. It is good practice to pass the -batchmode and -quit arguments as well, in order to quit Unity when done, if using this for automated activation of Unity. Please allow a few seconds before the license file is created, because Unity needs to communicate with the license server. Make sure that license file folder exists, and has appropriate permissions before running Unity with this argument. If activation fails, see the Editor.log for info.

public string Serial { get; set; }