安装完CE6后，会发现Platform Builder for CE5的Connectivity Options不好用了，即使修改设置后点Apply也无法把新设置保存住 在完全卸载CE6和VS2005后，点PB5的Connectivity Options会弹出这个错误： Platform Builder was unable to read the device settings from the Datastore.
即使把CE5和PB5完全卸载，然后再重装，改错误仍然存在。
我在网上搜到了该问题的解决方法 http://www.eggheadcafe.com/software/aspnet/29534746/cant-set-the-connectivit.aspx
为了防止这个网页哪天就不见了，我还是把那些内容COPY到自己BLOG里比较安全，嘿嘿
1) Shutdown all instances of PB (version 5.0 and later) and make sure Cepb.exe, CeSvcHost.exe (CeSvcH~1.exe) and DeviceEmulator.exe are gone from the task manager.
2) Back up the C:/Documents and Settings/<user>/local settings/application data/microsoft/corecon folder //我就直接DELETE掉，不用BACKUP了
3) Purge that folder [This will destroy all previously configured device settings. It is important to make a backup as in step 2 if you need to retain the other device settings and revert back].
4) Back up C:/Documents and Settings/all users/application data/microsoft/corecon/1.0/addons folder to something outside of //同样，直接DELETE掉
5) Purge that addons folder under the corecon/1.0
6) Create a new one by that name under the corecon/1.0 folder
7) Copy C:/Program Files/<PB Install folder>/CoreCon/SDK/XSL/Addons/*.xsl to the new .../coreCon/1.0/Addons folder you created.
8) Also copy C:/Program Files/<PB Install folder>/CEPB/bin/microsoft.platformbuilder500.servicecategory.xsl to the above addons folder.
9) Relaunch PB and try creating and configuring a new device.
该方法经本人验证，正确可用。很显然，CE6修改了core connectivity的方法，但是在卸载时却没有清理干净。