>I created another share on the same drive, such as Data2. I was able to connect to that share drive from Windows Explorer. So, the share works. However, from the code, it still cannot gain access to it. So, this confirms that the administrative share is not a factor. Either f$ or Data2 results in the same situation.

I think you are going the wrong way, I do not know .NET enough to help you, but if I do this in foxpro it would not work either:

clear
loLocator		= CREATEOBJECT('WBEMScripting.SWBEMLocator')
loWMI			= loLocator.ConnectServer()
loHDPs			= loWMI.ExecQuery('SELECT FreeSpace,QuotasDisabled,VolumeName,VolumeSerialNumber FROM Win32_LogicalDisk WHERE DeviceID="\\\\10.10.10.1\\c$"')

? DATETIME(), loHDPs.Count && Zero

FOR EACH loHD IN loHDPs
	? loHD.VolumeSerialNumber 
	? loHD.VolumeName
	? loHD.Freespace
NEXT loHD

But, if I connect to the remote machine then it will work just fine:

clear
loLocator		= CREATEOBJECT('WBEMScripting.SWBEMLocator')
loWMI			= loLocator.ConnectServer('10.10.10.1') && I am admin here too
loHDPs			= loWMI.ExecQuery('SELECT FreeSpace,QuotasDisabled,VolumeName,VolumeSerialNumber FROM Win32_LogicalDisk WHERE DeviceID="C:"') && No shares or anything, the local drive you are interested in
? DATETIME(), loHDPs.Count
FOR EACH loHD IN loHDPs
	? loHD.VolumeSerialNumber 
	? loHD.VolumeName
	? loHD.Freespace
NEXT loHD