SDK Sample: Changing the runtime version of an application pool in IIS 7

The following quick SDK sample demonstrates how to list and change the managed runtime version of application pools programatically in IIS 7.

[VB]

Imports System
Imports Microsoft.Web.Administration

Public Class AppPoolSample
    Shared manager As ServerManager = New ServerManager()

    ' Main application processing
    Public Shared Sub Main(ByVal args As String())
        ' Get the apppool to change
        Dim iPool As Integer = GetAppPool()

        ' Get the framework version desired
        Dim rtVersion As String = GetVersion()

        ' Set the apppool runtime
        Dim poolToSet As ApplicationPool = manager.ApplicationPools(iPool)

        Console.WriteLine("Setting application pool '{0}' to runtime version: {1}...", _
            poolToSet.Name, rtVersion)
        poolToSet.ManagedRuntimeVersion = rtVersion

        ' Commit the changes and recycle the application pool
        manager.CommitChanges()
        poolToSet.Recycle()

        Console.WriteLine("Your changes have been committed.")
    End Sub

    ' Prompts the user to select an application pool
    Public Shared Function GetAppPool() As Integer

        Dim pool As String = String.Empty
        Dim iPool As Integer = 0

        While (Not Integer.TryParse(pool, iPool))
            Console.WriteLine("Available ApplicationPools: Managed runtime version")
            Dim i As Integer
            For i = 0 To manager.ApplicationPools.Count - 1 Step i + 1
                Dim appPool As ApplicationPool = manager.ApplicationPools(i)
                Console.WriteLine("{3}{0,3}.{3}{1}: {2}", i + 1, _
                    appPool.Name, appPool.ManagedRuntimeVersion, vbTab)
            Next
            Console.Write("{0}Choose an application pool to change: ", vbCrLf)
            pool = Console.ReadLine()
        End While
        Return iPool - 1
    End Function

    ' Prompts a user to select the version of runtime they would like
    ' the application pool to use
    Public Shared Function GetVersion() As String
        Dim rtVersion As String = String.Empty
        Dim iVersion As Integer = 0

        While (Not Integer.TryParse(rtVersion, iVersion))
            Console.WriteLine("{0}  1.{0}Framework version 1.0", vbTab)
            Console.WriteLine("{0}  2.{0}Framework version 1.1", vbTab)
            Console.WriteLine("{0}  3.{0}Framework version 2.0", vbTab)
            Console.Write("Choose the new managed runtime version: ")
            rtVersion = Console.ReadLine()
        End While

        Select Case iVersion
            Case 1
                rtVersion = "v1.0"
            Case 2
                rtVersion = "v1.1"
            Case 3
                rtVersion = "v2.0"
        End Select

        Return rtVersion
    End Function
End Class

[C#

using System;
using Microsoft.Web.Administration;

public class AppPoolSample 
{
    static ServerManager manager = new ServerManager();
    
    // Main application processing
    public static void Main(string[] args)  
    {
        // Get the apppool to change
        int iPool = GetAppPool();

        // Get the framework version desired
        string rtVersion = GetVersion();

        // Set the apppool runtime
        ApplicationPool poolToSet = manager.ApplicationPools[iPool];

        Console.WriteLine("Setting application pool '{0}' to runtime version: {1}...",
            poolToSet.Name, rtVersion);
        poolToSet.ManagedRuntimeVersion = rtVersion;

        // Commit the changes and recycle the application pool
        manager.CommitChanges();
        poolToSet.Recycle();

        Console.WriteLine("Your changes have been committed.");
    }

    // Prompts the user to select an application pool
    public static int GetAppPool()
    {
        string pool = String.Empty;
        int iPool = 0;

        while ((!int.TryParse(pool, out iPool)) ||
                (iPool > manager.ApplicationPools.Count || iPool <= 0))
        {
            Console.WriteLine("Available ApplicationPools: Managed runtime version");
            for (int i = 0; i <= manager.ApplicationPools.Count - 1; i++)
            {
                ApplicationPool appPool = manager.ApplicationPools[i];
                Console.WriteLine("\t{0,3}.\t{1}: {2}", i + 1, 
                    appPool.Name, appPool.ManagedRuntimeVersion);
            }
            Console.Write("\r\nChoose an application pool to change: ");
            pool = Console.ReadLine();
        }
        return iPool -1;
    }

    // Prompts a user to select the version of runtime they would like
    // the application pool to use
    public static string GetVersion()
    {
        string rtVersion = String.Empty;
        int iVersion = 0;

        while ((!int.TryParse(rtVersion, out iVersion)) ||
                (iVersion > 3 || iVersion < 1))
        {
            Console.WriteLine("\r\n\t   1.\tFramework version 1.0");
            Console.WriteLine("\t   2.\tFramework version 1.1");
            Console.WriteLine("\t   3.\tFramework version 2.0");
            Console.Write("Choose the new managed runtime version: ");
            rtVersion = Console.ReadLine();
        }

        switch (iVersion)
        {
            case 1:
                rtVersion  = "v1.0";
                break;
            case 2:
                rtVersion = "v1.1";
                break;
            case 3:
                rtVersion = "v2.0";
                break;
        }

        return rtVersion;
    }
}