Both .vb and .cs compiles Okay.  The .vb module works in the portal.

C# gives error =  MinMax persistance type of cookie requires a ModuleId.   I'm not familiar at all with C#, so what could one add to the C# code to fix this?

ASCX File for vb.Net is

<%@ Control Language="vb" AutoEventWireup="false" Inherits="Hello_World_013.Hello_World_013" CodeBehind="Hello_World_013.vb" %>

<!-- Friday, September 08, 2006 -->
<asp:Label id=EZ_Label runat="server" CssClass="phd_SMC_Hello_World_013"></asp:Label>

ASCX File for C# is about the same thing:

<%@ Control language="C#" AutoEventWireup="true" Inherits="CSharp_014.CSharp_014" CodeFile="CSharp_014.cs"%>

<!-- CSharp_014 was created September 08, 2006 -->
<asp:Label id=EZ_Label runat="server" CssClass="phd_SMC_CSharp_014"></asp:Label>

The .vb code File for vb.Net is

Imports System
Imports System.Web
Imports System.IO
Imports System.Diagnostics
Imports System.Text
Imports DotNetNuke
Imports DotNetNuke.Common
Imports DotNetNuke.Common.Utilities
Imports DotNetNuke.Data
Imports DotNetNuke.Entities.Users
Imports DotNetNuke.Framework
Imports DotNetNuke.Services.Exceptions
Imports DotNetNuke.Services.Localization
Imports DotNetNuke.Services.Search
Imports DotNetNuke.UI
Imports Microsoft.VisualBasic

Namespace Hello_World_013

Public MustInherit Class Hello_World_013

Inherits DotNetNuke.Entities.Modules.PortalModuleBase

Protected WithEvents EZ_Label As System.Web.UI.WebControls.Label

Private _cssClass As String
Public Property CssClass() As String
    Get
        Return _cssClass
    End Get
    Set(ByVal Value As String)
        _cssClass = Value
    End Set
End Property

Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load

   Try

      If Not Page.IsPostBack Then

        If CssClass <> "" Then
          EZ_Label.CssClass = CssClass
        End If

      EZ_Label.Visible = True
EZ_Label.text = "Hello World"
      End If
     
    Catch exc As DotNetNuke.Services.Exceptions.BasePortalException
        Dim objXLogCtl As New DotNetNuke.Services.Log.EventLog.ExceptionLogController
        objXLogCtl.AddLog(exc)
    End Try

End Sub

End Class

End Namespace

The .cs code File for C# is

using System;
using System.Collections;
using System.Collections.Generic;
using System.Reflection;
using System.Web.UI;
using System.Web.UI.WebControls;

using DotNetNuke;
using DotNetNuke.Common.Utilities;
using DotNetNuke.Entities.Modules;
using DotNetNuke.Entities.Modules.Actions;
using DotNetNuke.Security;
using DotNetNuke.Services.Exceptions;
using DotNetNuke.Services.Localization;

namespace CSharp_014
{

    /// Disable assignment warning
    #pragma warning disable 649
    partial class CSharp_014 : PortalModuleBase
    {

        protected System.Web.UI.WebControls.Label EZ_Label;
       
        /// Page_Load
        protected void Page_Load(System.Object sender, System.EventArgs e)
        {
            try
            {
                EZ_Label.Text = "Hello World";
            }
            catch (Exception exc) //Module failed to load
            {
                Exceptions.ProcessModuleLoadException(this, exc);
            }

        }

    }
    #pragma warning restore 649
}