C# Read Windows Logon User Name in WMI

Using the namespace System.Management,
we can easily read the Windows Logon User name.

The WMI (Windows Media Instrumentation)
queries are very similar with the SQL queries.

The sample code below written in C# reads the logon user name.

using System.Management;

public static string logonUser()
{
string _user = string.Empty;
ConnectionOptions co = new ConnectionOptions();
System.Management.ManagementScope ms
= new System.Management.ManagementScope("\" + "localhost" + "rootcimv2", co);

System.Management.ObjectQuery oq =
new System.Management.ObjectQuery("SELECT * FROM Win32_ComputerSystem");
ManagementObjectSearcher query =
new ManagementObjectSearcher(ms, oq);

ManagementObjectCollection queryCollection;
queryCollection = query.Get();

foreach (ManagementObject mo in queryCollection)
{
_userl = mo["UserName"].ToString();
}

char[] charSeparators = new char[] { '' };

int deger = _user.Split(charSeparators, StringSplitOptions.None).Length;
_user= _user.Split(charSeparators, StringSplitOptions.None)[deger - 1];

return _user;
}

Will return the Windows Logon User name. Many other WMI queries are available.