title: What is the alternative of "ResolveUsing" in AutoMapper.Extensions.Microsoft.DependencyInjection 6.0.0
body: <p>I am working on <strong>.Net core 2.1</strong> with <a href="https://www.nuget.org/packages/automapper.extensions.microsoft.dependencyinjection/" rel="nofollow noreferrer">AutoMapper.Extensions.Microsoft.DependencyInjection 6.0.0</a>. This is my mapping configuration :</p>
  
  <pre><code>CreateMap&lt;User, UserForListDto&gt;()
     .ForMember(dest =&gt; dest.Age, opt =&gt; {
         opt.ResolveUsing(d =&gt; d.DateOfBirth.CalculateAge());
  });
  </code></pre>
  
  <p>Here <code>ResolveUsing</code> is not working, because it is removed or renamed in version <code>6.0.0</code>, but it works fine in version <code>4.0.1</code>.</p>
  
  <p>I don't find any reference about the changes on their <a href="https://github.com/AutoMapper/AutoMapper.Extensions.Microsoft.DependencyInjection" rel="nofollow noreferrer">github</a>. Can anybody tell me what is the alternative of <code>ResolveUsing</code> in version <code>6.0.0</code>? </p>
  
  <p>Issue created <a href="https://github.com/AutoMapper/AutoMapper.Extensions.Microsoft.DependencyInjection/issues/84#issue-409118058" rel="nofollow noreferrer">here</a></p>