List<string> tList = new List<string>();
tList.add("a");
tList.add("b");
tList.add("c");
tList.add("d");
//------------------------
var q = from s in tList
select s;
var qa = from s in tList.AsParallel()
select s;
//------------------------并行
Parallel.For(0,6,i=>
{
});
Parallel.ForEach(tList, str => {
});