Introduction
Well, 
that very tiny post but it is very useful when you wish to know the exact what 
your hosting provider supports. No need to ask them (hosting company) that which 
extension you support. By using couples of lines code-behind you can do it 
yourself. Let's look at the code which will make it possible.
I am 
using a single .aspx page with VB code-behind.
Code
<%@ Page Language="VB" %>
<%
@ Import Namespace="Microsoft.Win32" %> 
<
script runat="server">
    Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
        Dim componentsKeyName As String = "SOFTWARE\Microsoft\NET 
Framework Setup\NDP"
        Dim componentsKey As RegistryKey = 
Registry.LocalMachine.OpenSubKey(componentsKeyName)
        Dim instComps As String() 
= componentsKey.GetSubKeyNames()
        For Each instComp As String In instComps
            Dim key As RegistryKey = 
componentsKey.OpenSubKey(instComp)
            If instComp IsNot Nothing AndAlso instComp.StartsWith("v") Then
                lblVersion.Text 
= lblVersion.Text & instComp & " 
SP " & key.GetValue("SP") 
& ", 
"
            End If
        Next
    End Sub
</
script>
<html>
<head id="Head1" runat="server">  
    <title>CLR 
Versions</title>
</
head>
<body>
    <form id="form1" runat="server">
        <asp:Label ID="lblVersion" runat="server">There 
is following versions installed and
running: </asp:Label>|
    </form>
</
body>
</html>
HAVE A 
HAPPY CODING !!