ใช้ asp.net ในการ login user จาก AD ครับ แต่จะเอาชื่อนามสกุล ข้อมูล กลุ่มงาน จาก AD มาด้วยต้องใช้คำสั่งอะไรครับ ไม่ค่อยถนัด .net

Public Shared Function ValidateActiveDirectoryLogin(ByVal Domain As String, ByVal Username As String, ByVal Password As String) As Boolean
        Dim Success As Boolean = False
        Dim Entry As New System.DirectoryServices.DirectoryEntry("LDAP://.../" & Domain, Username, Password)
        Dim Searcher As New System.DirectoryServices.DirectorySearcher(Entry)
        Searcher.SearchScope = DirectoryServices.SearchScope.OneLevel
        Try
            Dim Results As System.DirectoryServices.SearchResult = Searcher.FindOne
            Success = Not (Results Is Nothing)
        Catch ex As Exception
            Success = False
        End Try
        Return Success
    End Function

public static bool ValidateActiveDirectoryLogin(string Domain, string Username, string Password)
{
	bool Success = false;
	System.DirectoryServices.DirectoryEntry Entry = new System.DirectoryServices.DirectoryEntry("LDAP://.../" + Domain, Username, Password);
	System.DirectoryServices.DirectorySearcher Searcher = new System.DirectoryServices.DirectorySearcher(Entry);
	Searcher.SearchScope = DirectoryServices.SearchScope.OneLevel;
	try {
		System.DirectoryServices.SearchResult Results = Searcher.FindOne;
		Success = (Results != null);
	} catch (Exception ex) {
		Success = false;
	}
	return Success;
}