blocks|key|3028724|text|好了，终于明白了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3028725|在%25windir%25\System32\inetsrv\Config\ApplicationHost.config中更改此行|offset|length|style|CODE|3028726|<add+name="ServiceModel"+type="System.ServiceModel.Activation.HttpModule,+System.ServiceModel,+Version=3.0.0.0,+Culture=neutral,+PublicKeyToken=b77a5c561934e089"+preCondition="managedHandler"+/>|code-block|syntax|javascript|3028727|至|3028728|<add+name="ServiceModel"+type="System.ServiceModel.Activation.HttpModule,+System.ServiceModel,+Version=3.0.0.0,+Culture=neutral,+PublicKeyToken=b77a5c561934e089"+preCondition="managedHandler,runtimeVersionv2.0"+/>|3028729|如果这还不够|3028730|将以下行添加到Web.config|3028731|<system.webServer>
++<modules+runAllManagedModulesForAllRequests="true"/>
</system.webServer>|3028732|entityMap^0|0|1|1J|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@$D|10|E|11|F|G]]|9|@]|A|$]]|$1|H|3|I|5|J|7|12|8|@]|9|@]|A|$K|L]]|$1|M|3|N|5|6|7|13|8|@]|9|@]|A|$]]|$1|O|3|P|5|J|7|14|8|@]|9|@]|A|$K|L]]|$1|Q|3|R|5|6|7|15|8|@]|9|@]|A|$]]|$1|S|3|T|5|6|7|16|8|@]|9|@]|A|$]]|$1|U|3|V|5|J|7|17|8|@]|9|@]|A|$K|L]]|$1|W|3|-4|5|6|7|18|8|@]|9|@]|A|$]]]|X|$]]

Ok, finally got it.

Change this line in <code>%windir%\System32\inetsrv\Config\ApplicationHost.config</code>

<pre><code>&lt;add name="ServiceModel" type="System.ServiceModel.Activation.HttpModule, System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" preCondition="managedHandler" /&gt;
</code></pre>

To

<pre><code>&lt;add name="ServiceModel" type="System.ServiceModel.Activation.HttpModule, System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" preCondition="managedHandler,runtimeVersionv2.0" /&gt;
</code></pre>

If this is not enough

Add this following line to the Web.config

<pre><code>&lt;system.webServer&gt;
 &lt;modules runAllManagedModulesForAllRequests="true"/&gt;
&lt;/system.webServer&gt;
</code></pre>

blocks|key|2816288|text|我的机器上安装了Windows8，aspnet_regiis.exe工具也不适用于我。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2816289|适用于我的解决方案发布在这个链接上，在Neha的答案上：System.ServiceModel.Activation.HttpModule+error|offset|length|2816290|2816291|+Everywhere这个解决方案的问题是使用aspnet_regiis.exe重新注册aspNet。但这对我不起作用。|blockquote|2816292|2816293|虽然这是一个有效的解决方案(这里解释得很好)|2816294|但它在Windows8上不起作用。|2816295|对于Windows8，您需要在".Net+Framework3.5“和”WindowsFramework4.5高级服务“下启用Windows特性和启用所有功能。|2816296|谢谢Neha|2816297|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/4374639/system-servicemodel-activation-httpmodule-error/15523900#15523900^0|0|S|1B|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|11|8|@]|9|@$D|12|E|13|1|14]]|A|$]]|$1|F|3|-4|5|6|7|15|8|@]|9|@]|A|$]]|$1|G|3|H|5|I|7|16|8|@]|9|@]|A|$]]|$1|J|3|-4|5|6|7|17|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|18|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|19|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|1A|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|1B|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|1C|8|@]|9|@]|A|$]]]|T|$U|$5|V|W|X|A|$Y|Z]]]]

I have Windows 8 installed on my machine, and the aspnet_regiis.exe tool did not worked for me either.
The solution that worked for me is posted on this link, on the answer by Neha: <a href="https://stackoverflow.com/questions/4374639/system-servicemodel-activation-httpmodule-error/15523900#15523900">System.ServiceModel.Activation.HttpModule error</a>
<blockquote>
Everywhere the problem to this solution was mentioned as re-registering aspNet by using aspnet_regiis.exe. But this did not work for me.
Though this is a valid solution (as explained beautifully here)
but it did not work with Windows 8.
For Windows 8 you need to Windows features and enable everything under &quot;.Net Framework 3.5&quot; and &quot;.Net Framework 4.5 Advanced Services&quot;.
Thanks Neha
</blockquote>

blocks|key|192605|text|尝试使用|type|unstyled|depth|inlineStyleRanges|entityRanges|data|192606|c:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe+-iru|code-block|syntax|javascript|192607|当多个版本的.NET框架在一台计算机上并行执行时，映射到ASP.NET应用程序的ASP.NET+ISAPI版本确定该应用程序使用哪个版本的公共语言运行库。|192608|上面的命令将安装与Aspnet_regiis.exe关联的ASP.NET版本，并且只在IIS中注册ASP.NET。|192609|https://support.microsoft.com/en-us/help/2015129/error-message-after-you-install-the--net-framework-4-0-could-not-load|offset|length|192610|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|0|0|3A|0|0^^$0|@$1|2|3|4|5|6|7|V|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|W|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|X|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|Y|8|@]|9|@]|A|$]]|$1|K|3|L|5|6|7|Z|8|@]|9|@$M|10|N|11|1|12]]|A|$]]|$1|O|3|-4|5|6|7|13|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|L]]]]

Try with 

<pre><code>c:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe -iru
</code></pre>

When multiple versions of the .NET Framework are executing side-by-side on a single computer, the ASP.NET ISAPI version mapped to an ASP.NET application determines which version of the common language runtime (CLR) is used for the application. 

Above command will Installs the version of ASP.NET that is associated with Aspnet_regiis.exe and only registers ASP.NET in IIS.

<a href="https://support.microsoft.com/en-us/help/2015129/error-message-after-you-install-the--net-framework-4-0-could-not-load" rel="noreferrer">https://support.microsoft.com/en-us/help/2015129/error-message-after-you-install-the--net-framework-4-0-could-not-load</a>

blocks|key|2816338|text|在Windows+server+2012中。转到->+Remove+ServiceModel3-0。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2816339|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

In Windows server 2012. Go to ISS -> Modules -> Remove the ServiceModel3-0.

blocks|key|2816359|text|您好，谢谢您的问题；解决方法：“未能从程序集'System.ServiceModel，Version=3.0.0.0，Culture=neutral，PublicKeyToken=b77a5c561934e089‘加载类型'System.ServiceModel.Activation.HttpModule’”|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2816360|在Windows功能中，选中.NET+4高级服务和.NET+3.5的全部|2816361|​|2816362|📷|atomic|offset|length|2816363|2816364|就像Nicolas+Gago一样，我尝试了aspnet_regiis.exe+-iru，但它不起作用。功能打开后，黄屏错误就消失了。谢谢；|2816365|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/8872ffb5b50eeb15dcd46b4c119df800.png|imageAlt^0|0|0|0|0|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|Y|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|Z|8|@]|9|@$I|10|J|11|1|12]]|A|$]]|$1|K|3|E|5|6|7|13|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|14|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|O|$P|$5|Q|R|S|A|$T|U|V|-4]]]]

Hello Thanks for the question; 
To resolve: "Could not load type 'System.ServiceModel.Activation.HttpModule' from assembly 'System.ServiceModel, Version=3.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'"

In Windows Features check all for .NET 4 Advanced Services &amp; .NET 3.5 

<img src="https://i.stack.imgur.com/1tIci.png" alt="enter image description here">

Just like Nicolas Gago I tried aspnet_regiis.exe -iru but it didn't work. After the features were on then it yellow screen error was gone. Thanks;

blocks|key|3028854|text|详细信息|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3028855|http://msdn.microsoft.com/en-us/library/hh169179(v=nav.71).aspx|offset|length|3028856|“当运行.NET的计算机上有多个版本的时，可能会发生此错误...”|3028857|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/hh169179%2528v=nav.71%2529.aspx^0|0|0|1R|0|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@$D|R|E|S|1|T]]|A|$]]|$1|F|3|G|5|6|7|U|8|@]|9|@]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

Details

<a href="http://msdn.microsoft.com/en-us/library/hh169179%28v=nav.71%29.aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/hh169179(v=nav.71).aspx</a>

"This error can occur when there are multiple versions of the .NET Framework on the computer that is running IIS..."

blocks|key|3028864|text|删除.Net错误消息中标识的模块，1票反对|type|unstyled|depth|inlineStyleRanges|entityRanges|data|3028865|在Windows+server+2012中。转到->+Remove+ServiceModel3-0。(没有数字对我有效)|3028866|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

delete the module which is identified in .Net error message , 1 down vote

In Windows server 2012. Go to ISS -> Modules -> Remove the ServiceModel3-0. (without number worked for me)

blocks|key|195046|text|从服务器管理器的功能节点中，您还可以删除.NET框架3.5.1功能下的一些子项，这些子项是通过激活某些其他角色来安装的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|195047|例如，删除WCF激活功能，如下所示，我们的网站返回：|195048|195049|.NET框架3.5.1+|unordered-list-item|195050|.NET框架3.5.1|195051|WCF+Activation+|195052|HTTP+HTTP|195053|195054|195055|195056|注意:这不需要我们重新启动。|195057|entityMap^0|0|0|0|1|1|2|2|1|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|W|8|@]|9|@]|A|$]]|$1|E|3|F|5|G|7|X|8|@]|9|@]|A|$]]|$1|H|3|I|5|G|7|Y|8|@]|9|@]|A|$]]|$1|J|3|K|5|G|7|Z|8|@]|9|@]|A|$]]|$1|L|3|M|5|G|7|10|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|11|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|12|8|@]|9|@]|A|$]]|$1|P|3|-4|5|6|7|13|8|@]|9|@]|A|$]]|$1|Q|3|R|5|6|7|14|8|@]|9|@]|A|$]]|$1|S|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|T|$]]

From the Server Manager's Features node, you can also remove some of the sub-items under the .NET Framework 3.5.1 Features that are installed by the activation of some of the other roles. 

For instance, removed the WCF Activation Features as follows and our websites came back:

<ul>
<li>[x] .NET Framework 3.5.1 Features</li>
<li>
 <ul>
 <li>[x] .NET Framework 3.5.1</li>
 <li>[ ] WCF Activation
 <ul>
 <li>[ ] HTTP Activation</li>
 <li>[ ] Non-HTTP Activation</li>
 </ul>
 </li>
 </ul>
</li>
</ul>

Note: this did not require a restart for us.

blocks|key|2816437|text|当我不小心将一个网站发布到另一个网站的目录中时，我得到了这个错误。这两个网站有不同版本的.net。对我来说，修复它的方法是更改应用程序池。为此，请在IIS管理器中执行以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2816438|单击网站=>高级设置...(在右侧)单击应用程序池右侧的=>+=>+a按钮，并显示"...“应出现经典选择".NET+v4.5+=>“|2816439|如果该应用程序池不工作，请尝试其他一些方法。|2816440|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|H|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|I|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|J|8|@]|9|@]|A|$]]|$1|F|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|G|$]]

I got this error after I accidentally published one website into the directory of another website. The two websites had different versions of .net. What fixed it for me was changing the application pool. To do that, in the IIS manager:

click the website => Advanced Settings... (on the right) => click to the right of Application Pool => a button with "..." should appear => select ".NET v4.5 Classic"

If that application pool doesn't work, try some of the others.

blocks|key|2816449|text|我们正在使用web服务和web站点，当我们发布web站点时，它会返回相同的这个错误。我们发现，通过进入IIS并从模块中删除ServiceModel，并从处理程序映射中删除svc-Integrated，错误就消失了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2816450|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

We are using a web service along side a web site and when we publish the web site it returns same this error. We found out that by going into IIS and removing the ServiceModel from Modules and the svc-Integrated from the Handler Mappings the error went away.

blocks|key|195099|text|您可以使用以下命令在带有powershell的windows+server+2012上安装这些功能：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|195100|Install-WindowsFeature+-Name++NET-Framework-Features+-IncludeAllSubFeature
Install-WindowsFeature+-Name++NET-WCF-HTTP-Activation45+-IncludeAllSubFeature|code-block|syntax|javascript|195101|您可以使用以下命令获取功能列表：|195102|Get-WindowsFeature+%7C+Format-Table|195103|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

You can install these features on windows server 2012 with powershell using the following commands:

<pre><code>Install-WindowsFeature -Name NET-Framework-Features -IncludeAllSubFeature
Install-WindowsFeature -Name NET-WCF-HTTP-Activation45 -IncludeAllSubFeature
</code></pre>

You can get a list of features with the following command:

<pre><code>Get-WindowsFeature | Format-Table
</code></pre>

blocks|key|2816461|text|开始->运行-->+c:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe+-iru|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2816462|entityMap^0|A|1W|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|K|8|@]|D|@]|E|$]]]|G|$]]

start-> Run--> <code>c:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe -iru</code>

blocks|key|2816503|text|我来晚了，希望它能帮助某些人....This是IIS8.0的一个已知问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2816504|解决方案是从|2816505|管理器中删除3.x模块和处理程序。如果要将它们保留在applicationHost.config中，可以在应用程序或站点级别将其删除。但我想把它们从applicationHost.config中删除。执行以下步骤：|blockquote|2816506|2816507|在IIS管理器中，单击“计算机名称”节点。在“功能视图”中，双击“模块”。找到“ServiceModel”并将其删除。解决IIS8错误的图1:无法加载类型‘System.ServiceModel.Activation.HttpModule’|2816508|返回到计算机名称节点的“功能视图”，双击“处理程序映射”。找到“svc-Integrated”并删除它。图2解决IIS8错误:无法加载类型‘System.ServiceModel.Activation.HttpModule’|2816509|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|P|8|@]|9|@]|A|$]]|$1|G|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|R|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|S|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|M|$]]

I am late, hope it will help someone ....This is a known issue with IIS 8.0

<blockquote>
 The solution is to delete the 3.x module and handler from IIS manager. You could delete them at the application or site level if you want to keep them in applicationHost.config. But I wanted to delete them from applicationHost.config. do the following steps:
 
 In IIS manager, click the machine name node.
 In “Features View”, double-click “Modules”.
 Find “ServiceModel” and remove it.
 Image 1 for Solve IIS 8 Error: Could not load type ‘System.ServiceModel.Activation.HttpModule’
 
 Go back to the machine name node’s “Features View”, double-click “Handler Mappings”.
 Find “svc-Integrated” and remove it.
 Image 2 for Solve IIS 8 Error: Could not load type ‘System.ServiceModel.Activation.HttpModule’
</blockquote>

blocks|key|2816530|text|您可以通过以管理员身份运行(适用于Windows+Server2008)打开命令提示符并运行命令C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe+-iru+settings.The+this将设置IIS+4.0，然后通过命令iisreset重置IIS，从而更改IIS功能并轻松解决这些步骤|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|2816531|参考资料：https://support.plesk.com/hc/en-us/articles/213392249-ASP-website-shows-error-Could-not-load-type-System-ServiceModel-Activation-HttpModule-from-assembly|2816532|entityMap|0|LINK|mutability|MUTABLE|url|https://support.plesk.com/hc/en-us/articles/213392249-ASP-website-shows-error-Could-not-load-type-System-ServiceModel-Activation-HttpModule-from-assembly^0|1C|3R|0|0|4E|5|49|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@$9|Q|A|R|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|H|3|-4|5|6|7|Y|8|@]|D|@]|E|$]]]|I|$J|$5|K|L|M|E|$N|O]]]]

You might changed the IIS features settings.The easy steps to resolve by open command prompt with run as administrator(For Windows Server 2008) and run the command
C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\aspnet_regiis.exe -iru
this will set up ASP.Net 4.0 ,Then Reset the IIS by the command
iisreset
References:
<a href="https://support.plesk.com/hc/en-us/articles/213392249-ASP-website-shows-error-Could-not-load-type-System-ServiceModel-Activation-HttpModule-from-assembly" rel="nofollow noreferrer">https://support.plesk.com/hc/en-us/articles/213392249-ASP-website-shows-error-Could-not-load-type-System-ServiceModel-Activation-HttpModule-from-assembly</a>

blocks|key|193071|text|出现此问题的原因是，Windows+Process+Activation+Service+(WAS)的Applicationhost.config文件包含一些与.NET+Framework4.0不兼容的标记。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|193072|根据您的环境，您有4种解决方法来解决此问题：|193073|在命名管道Activation+feature.|193074|Remove+ServiceModel+3.0上从IIS+|unordered-list-item|193075|
+Registration.|193076|Turn更新IIS+ASP.NET+IIS|193077|193078|193079|在|blockquote|193080|
上查看每个each的详细步骤|193081|entityMap^0|1F|M|0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Z|8|@$9|10|A|11|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|12|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|13|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|14|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|15|8|@]|D|@]|E|$]]|$1|O|3|P|5|L|7|16|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|17|8|@]|D|@]|E|$]]|$1|R|3|-4|5|6|7|18|8|@]|D|@]|E|$]]|$1|S|3|T|5|U|7|19|8|@]|D|@]|E|$]]|$1|V|3|W|5|6|7|1A|8|@]|D|@]|E|$]]|$1|X|3|-4|5|6|7|1B|8|@]|D|@]|E|$]]]|Y|$]]

This issue occurs because the <code>Applicationhost.config</code> file for Windows Process Activation Service (WAS) has some tags that are not compatible with the .NET Framework 4.0.
Based on your environment, you have 4 workarounds to solve this issue:
<ul>
<li>Updating Applicationhost.config.</li>
<li>Perform ASP.NET IIS Registration.</li>
<li>Turn on the Named Pipe Activation feature.</li>
<li>Remove ServiceModel 3.0 from IIS</li>
</ul>
<blockquote>
Check the detailed steps for each woraround at <a href="https://spgeeks.devoworx.com/could-not-load-type-system-servicemodel/" rel="nofollow noreferrer">Solving Could not load type system.servicemodel.activation.httpmodule from assembly System.ServiceModel</a>
</blockquote>

I'm running my Web Project in IIS.

It is a 4.0 Framework APP.

I have a Service.svc and I get this error when I run my Application.

<blockquote>
 "Could not load type 'System.ServiceModel.Activation.HttpModule' from
 assembly 'System.ServiceModel, Version=3.0.0.0, Culture=neutral,
 PublicKeyToken=b77a5c561934e089'"
</blockquote>

I tried this --> aspnet_regiis.exe -iru which I found in a lot of forums and it didn't solve my problem.

Does anyone know another method ?

Could not load type 'System.ServiceModel.Activation.HttpModule' from assembly 'System.ServiceModel

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我正在IIS中运行我的Web项目。这是一个4.0框架的应用程序。我有一个Service.svc，当我运行我的应用程序时，我得到了这个错误。“无法从程序集'System.ServiceModel，Version=3.0.0.0，Culture=neutral，PublicKeyToken=b77a5c561934e089...

问未能从程序集“System.ServiceModel”加载类型“System.ServiceModel.Activation.HttpModule”
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