Changes in web.config when .net framework is upgraded to 4.0 from 3.5

Question

User-510697852 posted

I have web application which was originally written in .net framework 3.5. I have changed .net framework to 4.0.

I noticed some changes in web.config file. 

Under 3.5 I had  <runtime /> section in web.config file. But when I changed to .net framework to 4.0, I can not see this section in web.config file.

<runtime>
<assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
<dependentAssembly>
<assemblyIdentity name="System.Web.Extensions" publicKeyToken="31bf3856ad364e35"/>
<bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/>
</dependentAssembly>
<dependentAssembly>
<assemblyIdentity name="System.Web.Extensions.Design" publicKeyToken="31bf3856ad364e35"/>
<bindingRedirect oldVersion="1.0.0.0-1.1.0.0" newVersion="3.5.0.0"/>
</dependentAssembly>
</assemblyBinding>
</runtime>            // This section not present in web.config under 4.0 framework.

I had under 3.5 framework,

<pages>
<controls>
<add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
<add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
</controls>
</pages>

But under 4.0 I have following,

<pages controlRenderingCompatibilityVersion="3.5" clientIDMode="AutoID" />

-----------

Wanted to know about these changes. Do I need to add <runtime /> section and change <pages /> section like 3.5 framework?

Answer 1

User753101303 posted

Hi,

Seems quite standard so no. Does it work ? Options were added over time to the web.config file and in 4.0 it was moved again to the general machine.config file so that you can have a simpler web.config file.

The options you see is to generate the same HTML markup and client ids in case you would have code depending on that...

Edit: see https://msdn.microsoft.com/en-us/library/s57a598e.aspx#aspnet_core_services and "Web.config File Refactoring".

Answer 2

User-510697852 posted

Yes without <runtime> section and <pages> section as per 4.0 it's working fine.