C#

[DesignerSerialzationVisibility(DesignerSerialization.Content)]

request.Credentials = System.Net.CredentialCache.DefaultCredentials;

public class Volume {

[DllImport("kernel32.dll", EntryPoint="GetVolumeInformation", CharSet=CharSet.Auto)]
public extern static int
   GetVolumeInfo(string sRootPathName,
                 StringBuilder sbVolumeNameBuffer, 
                 int nVolumeNameSize,
                 out uint uVolumeSerialNumber,
                 out uint uMaximumComponentLength,
                 out uint uFileSystemFlags,
                 StringBuilder sbFileSystemNameBuffer,
                 int nFileSystemNameSize);

[DllImport("kernel32.dll", EntryPoint="GetDriveType", CharSet=CharSet.Auto)]
public extern static uint
   GetDriveType(string sRootPathName);

[DllImport("kernel32.dll", EntryPoint="GetDiskFreeSpaceEx", CharSet=CharSet.Auto)]
public extern static int
   GetDiskFreeSpaceEx(string sAnyPath,
                      out ulong ulFreeBytesAvailable, 
                      out ulong ulTotalNumberOfBytes, 
                      out ulong ulTotalNumberOfFreeBytes);
}

//... usage somewhere else ...

uint uSerialNum, uMaxEntryLen, uFileSysFlags;
StringBuilder sbLabelBuf = new StringBuilder(260);
StringBuilder sbFileSysTypeBuf = new StringBuilder(260);

int iSuccess =
   Volume.GetVolumeInfo("C:\\", sbLabelBuf, sbLabelBuf.Capacity,
                        out uSerialNum, out uMaxEntryLen, out uFileSysFlags,
                        sbFileSysTypeBuf, sbFileSysTypeBuf.Capacity);

using System;
using System.Management; 
               
ManagementClass cls = new ManagementClass(null,"Win32_LogicalDisk",null);
cls.GetStronglyTypedClassCode(CodeLanguage.CSharp,"C:\temp\Logicaldisk.cs",String.Empty);