title: Json to C# not de-serializing currency symbol correctly
body: <p>I'm using C# WebApi with .NET Core 2.1. I have a JSON property in an appsetting.json file and when it's deserialized into c#, via <code>AddOptions</code>, the £ symbol is changed to �</p>
  <p>Can I add a setting to <code>AddJsonOptions</code> to ensure this symbol isn't changed?</p>
  <p>JSON
  &quot;SomeProperty&quot;: &quot;pound £&quot;,</p>
  <p>C# Property
  SomeProperty= &quot;pound �&quot;</p>