How do I get a parent of a directory, for example:
string upDir = GetOneLvlUp(@\"C:\\AAA\\BBB\\CCC\\DDD\\\"); Output: C:\\AAA\\BBB\\CCC\\
Everything you want is in the Directory class:
http://msdn.microsoft.com/en-us/library/system.io.directory.aspx
In particular, GetParent:
http://msdn.microsoft.com/en-us/library/system.io.directory.getparent.aspx