Don't Allow Closing a Case that has already been closed

[daryllabar]

It should create this error:

Unhandled Exception: System.ServiceModel.FaultException`1[[Microsoft.Xrm.Sdk.OrganizationServiceFault, Microsoft.Xrm.Sdk, Version=8.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35]]: This case has already been resolved. Close and reopen the case record to see the updates.Detail:

680d8887-4635-4adb-b8d0-aaa192d0f51f
-2147220273

This case has already been resolved. Close and reopen the case record to see the updates.
2017-06-16T12:54:23.5555163Z
false