打开表单偶尔会出现这个提示，解决方法：
web.config增加配置：
<configuration> <system.net> <settings> <httpWebRequest useUnsafeHeaderParsing="true" /> </settings> </system.net> </configuration>
The server committed a protocol violation. Section=ResponseHeader Detail=CR must be followed by LF
原文：http://www.cnblogs.com/niuge/p/5995541.html