Question: Using VB.NET, How do you Convert the sid to Group Name with Active Directory? 

example: I need to get "group\_test" and not "S-1-5-32-544"

The code I'm using is:

```
Public ReadOnly Property Groups As IdentityReferenceCollection
    Get

        Dim irc As IdentityReferenceCollection
        Dim ir As IdentityReference
        irc = WindowsIdentity.GetCurrent().Groups
        Dim strGroupName As String

        For Each ir In irc
            Dim mktGroup As IdentityReference = ir.Translate(GetType(NTAccount))
            MsgBox(mktGroup.Value)
            Debug.WriteLine(mktGroup.Value)
            strGroupName = mktGroup.Value.ToString

        Next

        Return irc

    End Get
End Property

```

or something like this? 

```
        currentUser = WindowsIdentity.GetCurrent()

        For Each refGroup As IdentityReference In currentUser.Groups

            Dim acc As NTAccount = TryCast(refGroup.Translate(GetType(NTAccount)), NTAccount)
            If AdminGroupName = acc.Value Then
                ret = "999"
            End If
            If UsersGroupName = acc.Value Then
                ret = "1"
            End If

```

how would u adapt it to this code? (if user is in xx group, show xx group on drop down list) 

```
        For Each UserGroup In WindowsIdentity.GetCurrent().Groups
            If mktGroup.Value = "BIG" Then
                Dim Company = ac1.Cast(Of MarketingCompany).Where(Function(ac) ac.MarketingCompanyShort = "BIG").FirstOrDefault
                If Company IsNot Nothing Then
                    marketingCo.Items.Add(String.Format("{0} | {1}", Company.MarketingCompanyShort, Company.MarketingCompanyName))
                End If
            End If
        Next

```

Answer: 
Here is a simple way writen in C#, I think it's not to hard to adapt :

```
  /* Retreiving object from SID
  */
  string SidLDAPURLForm = "LDAP://WM2008R2ENT:389/<SID={0}>";
  System.Security.Principal.SecurityIdentifier sidToFind = new System.Security.Principal.SecurityIdentifier("S-1-5-21-3115856885-816991240-3296679909-1106");

  DirectoryEntry userEntry = new DirectoryEntry(string.Format(SidLDAPURLForm, sidToFind.Value));

  string name = userEntry.Properties["cn"].Value.ToString();

```

Here it is in VB .NET thanks to [REFLECTOR](http://reflector.red-gate.com/download.aspx?TreatAsUpdate=1)

```
Dim SidLDAPURLForm As String = "LDAP://WM2008R2ENT:389/<SID={0}>"
Dim sidToFind As New SecurityIdentifier("S-1-5-21-3115856885-816991240-3296679909-1106")
Dim userEntry As New DirectoryEntry(String.Format(SidLDAPURLForm, sidToFind.Value))
Dim name As String = userEntry.Properties.Item("cn").Value.ToString

```

---- EDITED -----
So here is what you wants, but it's the same as that was previously given by @BiggsTRC

```
Private Shared Sub Main(args As String())
    Dim currentUser As WindowsIdentity = WindowsIdentity.GetCurrent()

For Each iRef As IdentityReference In currentUser.Groups
        Console.WriteLine(iRef.Translate(GetType(NTAccount)))
    Next
End Sub

```
Here is a link for how to convert a SID to a name: <http://vbdotnet.canbal.com/view.php?sessionid=JEf85K%2B%2BeBj9Pz%2BWz9hJJicW%2FYEPtADXfcpYCovZ7js%3D>

Basically, you get a DirectoryEntry object back which you can then use to get the name. However, if you are looking for what I believe to be an easier method to do this, just take the current user and do a lookup in AD for their group memberships. Here is an example of how to do that (you will need the larger article to actually accomplish your task but this code is the specific answer to your question): <http://www.codeproject.com/KB/system/everythingInAD.aspx#39>

Sorry about the fact that the code is in C#. However, you should be able to just use a converter to convert it to VB.NET without a problem.

Get User Group Memberships of the Logged in User from ASP.NET in C#

```
public ArrayList Groups()
{
    ArrayList groups = new ArrayList();

    foreach (System.Security.Principal.IdentityReference group in
            System.Web.HttpContext.Current.Request.LogonUserIdentity.Groups)
    {
        groups.Add(group.Translate(typeof
        (System.Security.Principal.NTAccount)).ToString());
    }

    return groups;
 }

```

Get User Group Memberships of the Logged in User from ASP.NET in VB.NET using [Developer Fusion's Converter Tool](http://www.developerfusion.com/tools/convert/csharp-to-vb/): 

```
    Public Function Groups() As ArrayList
        Dim groups__1 As New ArrayList()

        For Each group As System.Security.Principal.IdentityReference In                 System.Web.HttpContext.Current.Request.LogonUserIdentity.Groups

               groups__1.Add(group.Translate(GetType(System.Security.Principal.NTAccount)).ToString())
        Next

    Return groups__1
    End Function

```