问题
Currently stuck in C# 2, it would still be nice to use the parallel goodness of the TPL... is this possible?
回答1:
No it's not possible. TPL requires .NET 3.5 (IIRC there was a separate download but it was a beta version) and is built in .NET 4.0.
来源：https://stackoverflow.com/questions/3500614/is-it-possible-to-use-the-task-parallel-library-tpl-in-c-sharp-2-0