title: An error occurred creating the configuration section handler error in .NET 4.5
body: <p>I have a problem... nobody else can help so I wonder if anybody here can?</p>
  
  <p>I have a web service project (originally in .NET 2.0 but upgraded to .NET 4.5) which was working perfectly this morning. I also have a Winforms project which connects to the web services.</p>
  
  <p>When building the Winforms app, the build is successful, when running it, I get the error:</p>
  
  <blockquote>
    <p>An error occurred creating the configuration section handler for    applicationSettings/Windows.Main.Properties.Settings: Could not load file or assembly 'Application, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The system cannot find the file specified.</p>
  </blockquote>
  
  <p>I have looked through SO and other sites but cannot find anything specific that shows the cause of this error.  I've tried downgrading the .NET Frameworks and upgrading them again - everything is running on 4.5 - but this fails on:</p>
  
  <pre><code>[global::System.Configuration.ApplicationScopedSettingAttribute()]
  [global::System.Diagnostics.DebuggerNonUserCodeAttribute()]
  [global::System.Configuration.SpecialSettingAttribute(global::System.Configuration.SpecialSetting.WebServiceUrl)]
  [global::System.Configuration.DefaultSettingValueAttribute("http://localhost:53442/ConfigurationService.asmx")]
  public string Windows_Main_BnConfigurationService_ConfigurationService {
          get {
              return ((string)(this["Windows_Main_BnConfigurationService_ConfigurationService"]));
          }
  </code></pre>
  
  <p>I've checked through a load of code but cannot seem to find the cause of the problem. </p>
  
  <p>This will likely be an easy fix for somebody in the know, I'm just not in the know on this error however!  HELP?!</p>