string computer = "Computer_B";
string domain = "WORKGROUP";
string username = ".\LocalAdminUserName";
string plaintextpassword;

Console.WriteLine("Enter password:");
plaintextpassword = Console.ReadLine();

SecureString securepassword = new SecureString();
foreach (char c in plaintextpassword)
{
    securepassword.AppendChar(c);
}

CimCredential Credentials = new
CimCredential(PasswordAuthenticationMechanism.Default, domain,
username,securepassword);

WSManSessionOptions SessionOptions = new WSManSessionOptions();
SessionOptions.AddDestinationCredentials(Credentials);

CimSession Session = CimSession.Create(computer, SessionOptions);

var allVolumes = Session.QueryInstances(@"rootcimv2", "WQL", "SELECT * FROM Win32_LogicalDisk");

 // Loop through all volumes
 foreach (CimInstance oneVolume in allVolumes)
 {
       Console.Writeline(oneVolume.CimInstanceProperties["SystemName"].Value.ToString());
 }