Как получить имя пользователя windows c

I went over most of the answers here and none of them gave me the right user name.

In my case I wanted to get the logged in user name, while running my app from a different user, like when shift+right click on a file and «Run as a different user».

The answers I tried gave me the ‘other’ username.

This blog post supplies a way to get the logged in user name, which works even in my scenario:
https://smbadiwe.github.io/post/track-activities-windows-service/

It uses Wtsapi

Edit: the essential code from the blog post, in case it ever disappears, is

Add this code to a class inheriting from ServiceBase

[DllImport("Wtsapi32.dll")]
private static extern bool WTSQuerySessionInformation(IntPtr hServer, int sessionId, WtsInfoClass wtsInfoClass, out IntPtr ppBuffer, out int pBytesReturned);
[DllImport("Wtsapi32.dll")]
private static extern void WTSFreeMemory(IntPtr pointer);
 
private enum WtsInfoClass
{
    WTSUserName = 5, 
    WTSDomainName = 7,
}
 
private static string GetUsername(int sessionId, bool prependDomain = true)
{
    IntPtr buffer;
    int strLen;
    string username = "SYSTEM";
    if (WTSQuerySessionInformation(IntPtr.Zero, sessionId, WtsInfoClass.WTSUserName, out buffer, out strLen) && strLen > 1)
    {
        username = Marshal.PtrToStringAnsi(buffer);
        WTSFreeMemory(buffer);
        if (prependDomain)
        {
            if (WTSQuerySessionInformation(IntPtr.Zero, sessionId, WtsInfoClass.WTSDomainName, out buffer, out strLen) && strLen > 1)
            {
                username = Marshal.PtrToStringAnsi(buffer) + "\\" + username;
                WTSFreeMemory(buffer);
            }
        }
    }
    return username;
}

If you don’t have one already, add a constructor to the class; and add this line to it:

CanHandleSessionChangeEvent = true;

EDIT:
Per comments requests, here’s how I get the session ID — which is the active console session ID:

[DllImport("kernel32.dll")]
private static extern uint WTSGetActiveConsoleSessionId();

var activeSessionId = WTSGetActiveConsoleSessionId();
if (activeSessionId == INVALID_SESSION_ID) //failed
{
    logger.WriteLog("No session attached to console!");    
}

I went over most of the answers here and none of them gave me the right user name.

In my case I wanted to get the logged in user name, while running my app from a different user, like when shift+right click on a file and «Run as a different user».

The answers I tried gave me the ‘other’ username.

This blog post supplies a way to get the logged in user name, which works even in my scenario:
https://smbadiwe.github.io/post/track-activities-windows-service/

It uses Wtsapi

Edit: the essential code from the blog post, in case it ever disappears, is

Add this code to a class inheriting from ServiceBase

[DllImport("Wtsapi32.dll")]
private static extern bool WTSQuerySessionInformation(IntPtr hServer, int sessionId, WtsInfoClass wtsInfoClass, out IntPtr ppBuffer, out int pBytesReturned);
[DllImport("Wtsapi32.dll")]
private static extern void WTSFreeMemory(IntPtr pointer);
 
private enum WtsInfoClass
{
    WTSUserName = 5, 
    WTSDomainName = 7,
}
 
private static string GetUsername(int sessionId, bool prependDomain = true)
{
    IntPtr buffer;
    int strLen;
    string username = "SYSTEM";
    if (WTSQuerySessionInformation(IntPtr.Zero, sessionId, WtsInfoClass.WTSUserName, out buffer, out strLen) && strLen > 1)
    {
        username = Marshal.PtrToStringAnsi(buffer);
        WTSFreeMemory(buffer);
        if (prependDomain)
        {
            if (WTSQuerySessionInformation(IntPtr.Zero, sessionId, WtsInfoClass.WTSDomainName, out buffer, out strLen) && strLen > 1)
            {
                username = Marshal.PtrToStringAnsi(buffer) + "\\" + username;
                WTSFreeMemory(buffer);
            }
        }
    }
    return username;
}

If you don’t have one already, add a constructor to the class; and add this line to it:

CanHandleSessionChangeEvent = true;

EDIT:
Per comments requests, here’s how I get the session ID — which is the active console session ID:

[DllImport("kernel32.dll")]
private static extern uint WTSGetActiveConsoleSessionId();

var activeSessionId = WTSGetActiveConsoleSessionId();
if (activeSessionId == INVALID_SESSION_ID) //failed
{
    logger.WriteLog("No session attached to console!");    
}

Кстати, в дополнение к вопросу:
Можно следить за появлением explorer.exe и опред. с какими правами он запущен.
Таким образом, как только заходит другой юзер, запускается соотв. explorer.exe с его правами.

Но задача конечно в другом… Нам нужно ловить то событие когда именно переключаются учётные записи. Вошло может и 2, а работать может ток 1. Задача хотя б определить того, кто работает, если вошло несколько.

Добавлено через 1 минуту

Не подходит.. Я запускаю приложение с правами Админа из под другой учётки и это самое выводит, что я — админ…

Добавлено через 36 секунд
Т.е. по сути определяет с чьими правам я запускаю приложение.

Добавлено через 20 секунд
А надо — работающего юзверя