Count folder inside the folder

Can you help me how to count the folders inside the folder.

How can i count the sub folders after the FolderBrowserDialog is popup and choose that main folder consist of 3 folders.

I'm using

开发者_如何学CFolderBrowserDialog fbdialog = new FolderBrowswerDialog();

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Use System.IO.DirectoryInfo() class and its methods.

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Refer to the Recursive File and Directory Method to all the list of folders including Count of sub folders in a folder.