Possible Duplicate:
Calling Console.WriteLine from multiple threads
Just want to know if multiple threads call the same console.writeline, will it cause deadlock?
ClosureCowboy
It's safe! From MSDN:
Console I/O Streams
[...]
I/O operations using these streams are synchronized, which means multiple threads can read from, or write to, the streams.
来源：https://stackoverflow.com/questions/4812508/is-console-writeline-thread-safe