How do I set folder permissions using VB.Net

The code below is creating personal folders for users in the following format:
\\server\school\username
The server is always the same but the school and username change. The folders are being created exactly the way I want except permissions are not being set on the folders the way I would like. What I would like is for the permissions to be as follows:
domain\username - modify
domain\domain admins - full control
domain\callcenter - full control
nas\administrators - full control

The final result for a folder would be \\nas\school\tsmith1 with permissions being modify for tsmith1 and Full Control for domain admins, callcenter and nas administrators.

If Len(ex1) > 0 Then
            If (DTM.Context("LocationRootFolder") IsNot Nothing) Then
                If (DTM.Context("LocationMap") IsNot Nothing) Then
                    Dim filter1 As String = DTM.Context("LocationRootFolder")
                    Dim locations1 As System.Collections.Hashtable
                    locations1 = DTM.Context("LocationMap")
                    If Len(locations1(ex1)) > 0 Then
                        homeDir = String.Format(filter1, locations1(ex1), existingSam1)
                        Dim CurrentPath as String = homeDir
 Dim UserName1 As String = "domain\" & existingSam1
 Dim UserName2 As String = "domain\Domain Admins"
 Dim UserName3 As String = "domain\CallCenter"
 Dim UserName4 As String = "NAS\Administrators"
 
 Dim dInfo As New DirectoryInfo(CurrentPath)
 Dim dSecInfo As DirectorySecurity = dInfo.GetAccessControl(AccessControlSections.Access)
 Dim myRuleValue As Integer = 0
 
 myRuleValue =  FileSystemRights.Modify   'Add your wanted Access here
 Dim myRule as FileSystemAccessRule
 myRule = New FileSystemAccessRule(UserName1, myRuleValue, InheritanceFlags.ContainerInherit Or InheritanceFlags.ObjectInherit Or InheritanceFlags.None, PropagationFlags.None, AccessControlType.Allow)
 dSecInfo.AddAccessRule(myRule)
 dSecInfo.SetAccessRule(myRule)
 dInfo.SetAccessControl(dSecInfo)
                    End If

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