经在Server2008R2,Windows7,Windows10测试，只要修改相应的 User Agent 即可实现，参考代码(以IE8模式工作)如下：
var ieversion = (new WebBrowser()).Version.Major; string ua = "Mozilla/4.0 (MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E)"; if (ieversion <= 8) ua = "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E)";
关于 C# WebBrowser 行为与本机 IE 或 Edge 行为不一致问题
原文：https://www.cnblogs.com/nanfei/p/14864043.html