如何从C＃代码中删除计划任务

我使用下面的C＃Code在Windows 2008 Server中创建了Schedule Task.It工作正常，但当我从C＃Code.Its删除任务时显示错误消息访问被拒绝。（例外来自HRESULT：0X80070005（ E_ACCESSDENIED）



请查看以下代码并告知如何操作..



创建任务： - （它工作正常）

I have created Schedule Task in Windows 2008 Server using below C# Code.It works fine but when I Delete Task from C# Code.Its shows an error message as "Access is Denied. (Exception from HRESULT : 0X80070005 (E_ACCESSDENIED) "

Please check below code and advise how to do that..

Creating Task :- (It works fine)

private void CreateTask(string StrTaskName,string  StrDate)
     {
         using (TaskService ts = new TaskService())
         {
             TaskDefinition td = ts.NewTask();
             td.RegistrationInfo.Description = "SMS Alert System";
             td.Principal.LogonType = TaskLogonType.InteractiveToken;

             TimeTrigger dt = (TimeTrigger)td.Triggers.Add(new TimeTrigger());
             dt.StartBoundary = Convert.ToDateTime(StrDate);

             string doubleQuotedPath = string.Format(@"""{0}""", StrTaskName);
             td.Actions.Add(new ExecAction(@"D:\Alert\SMSAlertSystem.exe", doubleQuotedPath, null));
             ts.RootFolder.RegisterTaskDefinition(StrTaskName, td);


         }
     }

删除任务： - （不工作）

Deleting Task :- (Not working)

using (TaskService ts = new TaskService())
{
    ts.RootFolder.DeleteTask(StrtMessage.Trim());
}

我尝试过：



我已经尝试了上面的代码，但没有解决...

What I have tried:

I have tried above code,but not solved...