title: IgnoreSerializableAttribute not found in DefaultContractResolver when switching from .NET v4.7.2 to .NET Standard v2.0
body: <p>I'm in the process of migrating one of our libraries from .NET v4.7.2 to .NET Standard v2.0.</p>
  <p>This code compiles when using .NET v4.7.2</p>
  <pre><code>var resolver = new DefaultContractResolver
  {
      IgnoreSerializableAttribute = true,
      NamingStrategy = new CamelCaseNamingStrategy(true, true),
  };
  </code></pre>
  <p>but when using .NET Standard it does not. Apparently IgnoreSerializableAttribute is not part of DefaultContractResolver in v9.01 of Newtonsoft.Json when using .NET Standard.</p>
  <p>I'm using v9.01 of Newtonsoft.Json as we're still using v1.0 Azure functions and they only work with v9.01.</p>
  <p>Can anyone explain what's happening and why there's a difference between Newtonsoft.Json v9.01 in .NET v4.7.2 and .NET Standard v2.0?</p>