title: A potentially dangerous Request.Form value was detected from the client error
body: <p>I have this error in an asp.net page when running my page. I have a ckeditor on the page and when writing in then editor and saving my changes, this error occurs. And I have this code in the page:</p>
  
  <pre><code>&lt;%@ Page Language="C#" ValidateRequest="false"
  </code></pre>
  
  <p>and I have this code in web.config:</p>
  
  <pre><code>&lt;system.web&gt;
      &lt;pages validateRequest="false" /&gt;
      &lt;compilation debug="true" targetFramework="4.5"&gt;
        &lt;assemblies&gt;
          &lt;add assembly="DevExpress.Web.ASPxGridView.v11.1, Version=11.1.7.0, Culture=neutral, PublicKeyToken=B88D1754D700E49A" /&gt;
          &lt;add assembly="DevExpress.Web.ASPxEditors.v11.1, Version=11.1.7.0, Culture=neutral, PublicKeyToken=B88D1754D700E49A" /&gt;
          &lt;add assembly="DevExpress.Web.v11.1, Version=11.1.7.0, Culture=neutral, PublicKeyToken=B88D1754D700E49A" /&gt;
          &lt;add assembly="DevExpress.Data.v11.1, Version=11.1.7.0, Culture=neutral, PublicKeyToken=B88D1754D700E49A" /&gt;
          &lt;add assembly="System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" /&gt;
          &lt;add assembly="System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" /&gt;
        &lt;/assemblies&gt;
      &lt;/compilation&gt;
      &lt;httpRuntime targetFramework="4.5" /&gt;
      &lt;httpModules&gt;
        &lt;add type="DevExpress.Web.ASPxClasses.ASPxHttpHandlerModule, DevExpress.Web.v11.1, Version=11.1.7.0, Culture=neutral, PublicKeyToken=b88d1754d700e49a" name="ASPxHttpHandlerModule" /&gt;
      &lt;/httpModules&gt;
        &lt;/system.web&gt;
  </code></pre>
  
  <p>and this is error:</p>
  
  <pre><code>A potentially dangerous Request.Form value was detected from the client (Textbody="&lt;p&gt;hello&lt;/p&gt;
  ").
  </code></pre>
  
  <p>How do I solve problem؟؟</p>