WebRequest.Create Hangs in Client system with Windows 8.1 with Fmrk 4.5

Question

Hi,
We are hosting a Windows Form in IE builded with .Net Target Framework 3.5 and running in ASP.Net website's run time .Net Framework 2.0.
Till now, this is working in Windows 7 and IE11 combination. When we planned to migrate to Windows 8 and IE11 combination, some functionalities in the Windows form hosted in IE fails, its keep on hanging.
When we debugged the code, we found that hanging happens at
1. To insert a image 
WebRequest request = WebRequest.Create(url);
2. While doing webservice call
CSpellCheckerWS objCUserDictionaryWordsWS = new CSpellCheckerWS();
Please find below our Trails for workaround:
1. We have try catch block on top of above lines, but it never comes to catch or proceed (checked for more than 30 minutes), its keep on running that makes IE to hang. End user have to kill the IE to proceed with our web application.
2. We have timeout option for WebRequest object, but we are having problem in the constructor itself, so unable to make use of timeout option.
3. We planned to use HttpClient object, but for this we need to build our Windows Form with Target Framework .Net 4.5. But .Net framework 4.5 will no longer support to host the Windows Form in IE.
4. We observed that, for our Windows Form project dll, say abcd.dll, we have ref link to abcd.config.xml
in the ASP.Net hosted web page. If we remove the *.config.xml, then we do not have this hanging issue. So, our problem solves here. But we faced another problem. Now we are getting
404 errors for all the dependent child dll for our main dll, abcd.dll. Even though we have child dlls in the same folder of abcd.dll, it is checking in website root folder, bin folder , .exe, .dll and finally after 8 iterations, it is picking
the correct dll. So for multiple child dlls we are getting 9 * no. of child dlls = 404 errors. So, we are unable to proceed further.
200 http://localhost/BrowserWebSite.CSharp/Default.aspx
200 http://localhost/BrowserWebSite.CSharp/BrowserBin/BrowserApplication.dll
200 http://localhost/BrowserWebSite.CSharp/BrowserApplication.config.xml
200 http://localhost/BrowserWebSite.CSharp/BrowserBin/BrowserApplication.dll
404 http://localhost/BrowserWebSite.CSharp/BrowserChildApplication.DLL
404 http://localhost/BrowserWebSite.CSharp/BrowserChildApplication/BrowserChildApplication.DLL
404 http://localhost/BrowserWebSite.CSharp/bin/BrowserChildApplication.DLL
404 http://localhost/BrowserWebSite.CSharp/bin/BrowserChildApplication/BrowserChildApplication.DLL
404 http://localhost/BrowserWebSite.CSharp/BrowserChildApplication.EXE
404 http://localhost/BrowserWebSite.CSharp/BrowserChildApplication/BrowserChildApplication.EXE
404 http://localhost/BrowserWebSite.CSharp/bin/BrowserChildApplication.EXE
404 http://localhost/BrowserWebSite.CSharp/bin/BrowserChildApplication/BrowserChildApplication.EXE
200 http://localhost/BrowserWebSite.CSharp/BrowserBin/BrowserChildApplication.DLL
So, please guide us how to proceed further. What is the relation between the *.config.xml and WebRequest.Create constructor and 404 errors.
We have simple test application to replicate the issue. If needed, I can share the application.
System Requirements to replicate : Windows 8.1, IE 11 and (Client system having .Net 4.5) and Windows / Web projects builded with .Net 3.5/2.0 respectively.
Note : We have run caspol settings and set EnableIEHosting to 1 (DWord).

Answer 1

Hello,
>>When we planned to migrate to Windows 8 and IE11 combination, some functionalities in the Windows form hosted in IE fails, its keep on hanging.
What .NET Framework version are you using after you migrate your client to windows 8 and IE11? If it is 4.0 or 4.5, I am afraid this is by designed because hosting controls in IE is now blocked by default (as of v4 or v4.5). See MSDN article under
'Web Applications'.
You could still enable it by modifying its provided registry key.
By the way, since this issue is related with IE and web application, I suggest that you could post such kind of issues to related forum, as
IE forum and Web forum.
Regards.
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