c# - How to get Windows start username?

Well, I posted this question earlier but I haven't got the correct answer before it was marked as a duplicate. I think this is a different question, all the methods that I used returns a wrong output.

I wanted to know how to solve this. A sample output is here:

the code:

Imports System.Security.Principal
Imports System.Threading
Imports System.IO
Imports System

Public Class Form1


    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        MsgBox("1: " & System.Security.Principal.WindowsIdentity.GetCurrent().Name.ToString & vbCrLf & _
               "2: " & Environment.UserDomainName & vbCrLf & _
               "3: " & WindowsIdentity.GetCurrent().Name & vbCrLf & _
                "4: " & Thread.CurrentPrincipal.Identity.Name & vbCrLf & _
               "5: " & Environment.UserName & vbCrLf & _
               "6: " & My.User.Name & vbCrLf &
                "7: " & My.Computer.Name)


        ' System.DirectoryServices.AccountManagement.UserPrincipal.Current.DisplayName()
    End Sub

End Class

I don't even know the correct term / name for this Windows username.

Answer

Use System.DirectoryServices.AccountManagement.UserPrincipal.Current.DisplayName

As noted by the replies on this thread, you can use this by adding a reference to System.DirectoryServices.AccountManagement.dll in your project.