How to Programmatically Restart an IIS Application Pool from C#?

Programmatically Restarting IIS Application Pools with C#

IIS application pools provide crucial isolation and management for web applications on a server. Restarting (or recycling) an application pool clears the application's memory footprint and reloads it. This is often necessary to address unresponsive applications or implement newly deployed code.

C# Implementation for IIS Application Pool Recycling

The most straightforward method to programmatically restart an IIS application pool within a C# application involves utilizing:

<code class="language-csharp">HttpRuntime.UnloadAppDomain();</code>

Executing this command unloads the current application domain, triggering a recycle of the associated IIS application pool.

Illustrative Code Example (.NET 2 Compatible)

Below is a sample implementation demonstrating this functionality within a .NET 2 application:

<code class="language-csharp">using System;
using System.Web;

namespace AppPoolRestart
{
    public class RestartAppPoolHandler : IHttpHandler
    {
        public void ProcessRequest(HttpContext context)
        {
            // Initiate application pool restart
            HttpRuntime.UnloadAppDomain();

            // Redirect the user following the restart
            context.Response.Redirect("~/Default.aspx");
        }

        public bool IsReusable
        {
            get { return false; }
        }
    }
}</code>

After saving and compiling this code, integrate it into your IIS website as a web handler. Subsequently, any request directed to the handler's URL will initiate an application pool restart.

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