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Thursday, February 26, 2015

Visual Studio Project 'Consider app.config remapping of assembly' error

Working with various types of projects with SharePoint, it's likely you will come across this error:

Consider app.config remapping of assembly "Microsoft.SharePoint.Security, Culture=neutral, PublicKeyToken=71e9bce111e9429c" from Version "14.0.0.0" [] to Version "15.0.0.0" [C:\Program Files\Common Files\microsoft shared\Web Server Extensions\15\ISAPI\Microsoft.SharePoint.Security.dll] to solve conflict and get rid of warning.

The particular assembly might be different depending on which ones you have added or included in the project (this is common since SharePoint 2013 has to support 2010). The fix is easy - open the app.config file in your project - by default it should look like this:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <startup>
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
    </startup>
</configuration>

The fix is to map the assembly by adding the <runtime> section below:

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
    <startup>
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5" />
    </startup>
  <runtime>   
    <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
      <dependentAssembly>
          <assemblyIdentity name="Microsoft.SharePoint.Security" publicKeyToken="71e9bce111e9429c" culture="neutral"/>
          <bindingRedirect oldVersion="14.0.0.0" newVersion="15.0.0.0"/>
      </dependentAssembly>
    </assemblyBinding>
</runtime>
</configuration>

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