问如何使用Task.Factory.StartNew<>保存不同的进程结果？

EN

var tasks = new Task[4];
var EachTastResult = new int[4];

for (var proc = 0; proc < 4; proc++)
{
int procIndex = proc;    // Helper for closure

// Start one task per processor
tasks[proc] = Task.Factory.StartNew(() =>{

var NotExist_localCounter = 0;

for (var i = ((proc - 1) * foursec) + 1 ; i <= (proc * foursec); i++)
{
    if (condition_1 ...)
        if (Condition_2 ...)
            NotExist_localCounter++;
}
EachTastResult[procIndex] = NotExist_localCounter;
}, CancellationToken.None,TaskCreationOptions.None ,TaskScheduler.Default);}

Task.WaitAll(tasks);

NotExist_1 = EachTastResult.Sum();
label6.Text=NotExist_1.ToString();