
I don’t know this problem
Error 1 Unable to copy file "C:\Program Files (x86)\Microsoft SDKs\Windows Phone\v7.1\Toolkit\Oct11\Bin\Microsoft.Phone.Controls.Toolkit.dll" to "Bin\Debug\Microsoft.Phone.Controls.Toolkit.dll". Not a valid Win32 FileTime.
Parameter name: fileTime PanoramaApp1
My OS Win7 64bits, I try it on 32bits same problem
If you look at the .DLL through Windows Explorer, what does it say the Create, Modified and Accessed times are?
It may be possible that the value for one of these fields exceeds the FileTime type, have you tried reinstalling the SDK?