Just got a random bsod on my machine and Form1.cs is suddenly empty, any way to restore the code? thanks..
You could check C:\Documents and Settings\UserName\My Documents\Visual Studio 2010\Backup Files\ (or the equivalent on your system).
Files will be placed there if auto-recover is enabled, which I believe it is by default. If you want to check that feature is enabled, follow the steps here: http://blogs.msdn.com/b/zainnab/archive/2010/06/30/autorecover-vstipenv0019.aspx
Another top tip is to set 'Save all changes' before building. That setting is in Options, under Projects and Solutions / Build and Run.
来源：https://stackoverflow.com/questions/3900743/does-visual-studio-2010-create-backup-files