1. Set a conditional break point that I knew would only hit on the thread that I was looking for.
2. Once the breakpoint hits and you are in the thread you want, in the Visual Studio Threads window (while debugging, Debug -> Windows -> Threads), Ctrl + A (to select all threads), and then Ctrl + click the thread you are currently on. You should have all threads except the one you want to debug selected.
3. Right-click, and choose "Freeze".
参考になった。
