Asp.Net程序目录下文件夹或文件操作导致Session失效的解决方案

<system.web>
 <sessionState mode="StateServer" stateConnectionString="tcpip=127.0.0.1:42424" sqlConnectionString="data 
 source=127.0.0.1;Trusted_Connection=yes" cookieless="false" timeout="40"/>
</system.web>

void Application_Start(object sender, EventArgs e)
 {
 // 在应用程序启动时运行的代码
 try
 {
 //启动ASP.NET 状态服务
 string g_serviceName = "aspnet_state";
 System.ServiceProcess.ServiceController[] serviceControllers = 
 System.ServiceProcess.ServiceController.GetServices();
 foreach (System.ServiceProcess.ServiceController service in serviceControllers)
 {
 if (service.ServiceName == g_serviceName)
 {
 if (service != null && service.Status != System.ServiceProcess.ServiceControllerStatus.Running)
 {
 service.Start();
　　　　　　　　　　　　　　 SimpleLogHelper.WriteError(g_serviceName + "服务已开启");
 }
 else
 {
 if (service == null)
 {
 SimpleLogHelper.WriteError(g_serviceName + "服务未安装");
 }
 else
 {
 SimpleLogHelper.WriteError(g_serviceName + "服务正在运行...");
 }
 }
 break;
 }
 }
 }
 catch (Exception ex)
 {
 SimpleLogHelper.WriteError(ex.ToString());
 }
 }