title: Are there known limitations with the WCF Test Client app?
body: <p>This has happened a couple of times to me know. If I add to many OperationContract's to a ServiceContract, the WCF Test Client app throws an exception:</p>
  
  <p>"Failed to add a service. Service metadata may not be accessible. Make sure your service is running and exposing metadata." </p>
  
  <p>In the details it continues:</p>
  
  <p>Error: Cannot obtain Metadata from . The request failed with HTTP status 400: Bad Request.</p>
  
  <p>If I remove a couple of operation contracts then everything is fine. Outside of the test client is also fine.</p>