Unhandled Exception:

System.EntryPointNotFoundException: NlUnload assembly:<unknown assembly> type:<unknown type> member:(null)

  at (wrapper managed-to-native) System.Windows.Documents.NLGSpellerInterop+UnsafeNlMethods.NlUnload()

  at System.Windows.Documents.NLGSpellerInterop.Dispose (System.Boolean disposing) [0x0003d] in <973d1f7a2e174d95b937c5a12aeb6e9f>:0

  at System.Windows.Documents.NLGSpellerInterop.Finalize () [0x00002] in <973d1f7a2e174d95b937c5a12aeb6e9f>:0

[ERROR] FATAL UNHANDLED EXCEPTION: System.EntryPointNotFoundException: NlUnload assembly:<unknown assembly> type:<unknown type> member:(null)

  at (wrapper managed-to-native) System.Windows.Documents.NLGSpellerInterop+UnsafeNlMethods.NlUnload()

  at System.Windows.Documents.NLGSpellerInterop.Dispose (System.Boolean disposing) [0x0003d] in <973d1f7a2e174d95b937c5a12aeb6e9f>:0
