title: xs:string field element in BizTalk schema changes to Uint16
body: <p>I have a schema defined in my BizTalk project, from a JSON instance. The instance key/values are in double quotations so they this means they are strings. But the JSON Schema Wizard set it as <code>xs:unsignedShort</code>. I changed it to <code>xs:string</code>. When I run my project and some messages contains numbers grater than 65535 this error appears. I get this error from tracked instances from my custom (xml to json) pipeline:
  <code>Reason: Value was either too large or too small for a UInt16.</code>
  I also checked <code>Schemas</code> tab in Microsoft BizTalk Administration Console for my schema; the schema view is same as the project in Visual Studio. What is the problem? I got confused..</p>