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Clouds: Purge deleted file
As long as the file is in Trash, you can purge it completely it by calling TElBoxFile.Purge() method. After calling this method the file is removed from Trash, and the instance of TElBoxFile is destroyed and you should not use it further.
C#:
TElBoxFile trashedFile = storage.AcquireTrashedFile(@"...");
Console.WriteLine("File: {0}", trashedFile.Name);
trashedFile.Purge();