之前安装的C#环境变量：

%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;%SYSTEMROOT%\System32\WindowsPowerShell\v1.0\;D:\Program Files\Microsoft SQL Server\100\Tools\Binn\;D:\Program Files\Microsoft SQL Server\100\DTS\Binn\;D:\Program Files\Microsoft SQL Server\100\Tools\Binn\VSShell\Common7\IDE\;C:\Program Files\Microsoft Visual Studio 9.0\Common7\IDE\PrivateAssemblies\;C:\Program Files\Windows Kits\8.1\Windows Performance Toolkit\;C:\Program Files\Microsoft SQL Server\110\Tools\Binn\;D:\Program Files\Microsoft SQL Server\90\Tools\binn\;C:\Program Files\SinoVoice\jTTS 5.0 Desktop\Bin;C:\Program Files\VisualSVN\bin;C:\Program Files\TortoiseSVN\bin