winfrom中的webbrowser内核版本修改

vs2008，winfrom中的webbrowser  其内核默认为IE7，当网页中存在IE7不支持的属性时回报错。

          
     private void Form1_Load(object sender, EventArgs e)
        {

            SetWebBrowserFeatures(11);          
        }


 static void SetWebBrowserFeatures(int ieVersion)
        {
            // don't change the registryif running in-proc inside Visual Studio 
            if (LicenseManager.UsageMode != LicenseUsageMode.Runtime) return;
            //获取程序及名称  
            var appName = System.IO.Path.GetFileName(System.Diagnostics.Process.GetCurrentProcess().MainModule.FileName);
            //得到浏览器的模式的值 
            UInt32 ieMode = GeoEmulationModee(ieVersion);
            var featureControlRegKey = @"HKEY_CURRENT_USERSoftwareMicrosoftInternet ExplorerMainFeatureControl";
            //设置浏览器对应用程序（appName）以什么模式（ieMode）运行  
            Registry.SetValue(featureControlRegKey + "FEATURE_BROWSER_EMULATION", appName, ieMode, RegistryValueKind.DWord);
            // enable the features which are "On" for the full Internet Explorer browser  //不晓得设置有什么用  
            Registry.SetValue(featureControlRegKey + "FEATURE_ENABLE_CLIPCHILDREN_OPTIMIZATION", appName, 1, RegistryValueKind.DWord);
        }

        static int GetBrowserVersion()
        { 
             int browserVersion = 0; 
             using (var ieKey = Registry.LocalMachine.OpenSubKey(@"SOFTWAREMicrosoftInternet Explorer", RegistryKeyPermissionCheck.ReadSubTree, System.Security.AccessControl.RegistryRights.QueryValues)) { var version = ieKey.GetValue("svcVersion"); 
                 if (null == version)
                 { 
                     version = ieKey.GetValue("Version");
                     if (null == version) throw new ApplicationException("Microsoft Internet Explorer is required!"); 
                 } 
                 int.TryParse(version.ToString().Split('.')[0], out browserVersion); } //如果小于7 
             if (browserVersion < 7) 
             { throw new ApplicationException("不支持的浏览器版本!"); } return browserVersion; 
         }

        static UInt32 GeoEmulationModee(int browserVersion)
        { 
             UInt32 mode = 11000; // Internet Explorer 11. Webpages containing standards-based !DOCTYPE directives are displayed in IE11 Standards mode.   
             switch (browserVersion) {
                 case 7: mode = 7000;break; 
                 case 8: mode = 8000;break; 
                 case 9: mode = 9000;break;
                 case 10: mode = 10000;break; 
                 case 11: mode = 11000;break; 
             } 
             return mode;
         }