启动vs2015专业版时，出现类似于这样的提示框，有好几个，点击是或否，但下次打开还是会出现。笔者也寻找了网上的一些解决办法，例如用vs命令窗口或其他，但都无疾而终，下面提供的这个办法，顺利解决此问题，以供.net从业者参考。
打开路径 C:\Users\用户名\AppData\Roaming\Microsoft\VisualStudio\14.0 将下面的文档放入该文件夹；
文档名：ActivityLog.xml
内容：
<entry>
<record>257</record>
<time>2010/05/02 20:36:35.490</time>
<type>Error</type>
<source>VisualStudio</source>
<description>CreateInstance failed for package [Microsoft.Data.Entity.Design.BootstrapPackage.BootstrapPackage, Microsoft.Data.Entity.Design.BootstrapPackage, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]</description>
<guid>{7A4E8D96-5D5B-4415-9FAB-D6DCC56F47FB}</guid>
<hr>80070002</hr>
<errorinfo>Could not load file or assembly 'Microsoft.Data.Entity.Design.BootstrapPackage, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.</errorinfo>
</entry>
<entry>
<record>258</record>
<time>2010/05/02 20:36:35.513</time>
<type>Error</type>
<source>VisualStudio</source>
<description>End package load [Microsoft.Data.Entity.Design.BootstrapPackage.BootstrapPackage, Microsoft.Data.Entity.Design.BootstrapPackage, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a]</description>
<guid>{7A4E8D96-5D5B-4415-9FAB-D6DCC56F47FB}</guid>
<hr>80004005 - E_FAIL</hr>
<errorinfo>Could not load file or assembly 'Microsoft.Data.Entity.Design.BootstrapPackage, Version=10.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.</errorinfo>
</entry>
XML