private async void CheckGlobalTask(object state)
{
List <TaskSch> globalTasks = TasksBLL.GetGlobalTaskList("waiting");
if (globalTasks.Count == 0)
{
IsGlobalTaskRunning = false;
}
else
{
IsGlobalTaskRunning = true;
var earlistStartTime = globalTasks.Min(task => task.Created);
var earlistGlobalTasks = globalTasks.Where(task => task.Created == earlistStartTime);
await ExecuteGlobalTasks(earlistGlobalTasks.ToList());
_globalTaskCheckTimer.Change(2000, Timeout.Infinite);
}
}