Call this method from your application to set GemBox.Spreadsheet Professional serial key.
You should call this method before using any other class from GemBox.Spreadsheet Professional library. Key can only be set once (if you try second key, exception will be thrown). The best place to call this method is from static constructor of your application's main class.
Valid serial key has four groups of four alphanumeric characters, separated with dashes (for example: "ABC1-A2BC-3ABC-AB4C").
SpreadsheetInfo Class | GemBox.Spreadsheet Namespace