在global.asax (C#，.Net)之外捕获会话状态事件？

using System;
using System.Web;

public class SessionStateModule : IHttpModule
{
    public void Init(HttpApplication context)
    {
        context.AcquireRequestState += new EventHandler(context_AcquireRequestState);
        context.ReleaseRequestState += new EventHandler(context_ReleaseRequestState);
        context.EndRequest += new EventHandler(context_EndRequest);
    }

    public void Dispose()
    {
        // 清理资源
    }

    private void context_AcquireRequestState(object sender, EventArgs e)
    {
        // 在会话状态获取之前执行的逻辑
    }

    private void context_ReleaseRequestState(object sender, EventArgs e)
    {
        // 在会话状态释放之前执行的逻辑
    }

    private void context_EndRequest(object sender, EventArgs e)
    {
        // 在请求结束之前执行的逻辑
    }
}

<httpModules>
  <add name="SessionStateModule" type="YourNamespace.SessionStateModule" />
</httpModules>