本文章主要讲的是当安装完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。

下面就说说解决方案了：
 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。