Downgrade to Newtonsoft.Json 9.0.1

build/Versions.props

@@ -25,7 +25,7 @@
     <MicrosoftDiaSymReaderNativeVersion>1.6.0-beta2-25219</MicrosoftDiaSymReaderNativeVersion>
     <MicrosoftDiaSymReaderPortablePdbVersion>1.3.0-beta1-61619-01</MicrosoftDiaSymReaderPortablePdbVersion>
     <MicrosoftMetadataVisualizerVersion>1.0.0-beta1-61530-02</MicrosoftMetadataVisualizerVersion>
-    <NewtonsoftJsonVersion>10.0.2</NewtonsoftJsonVersion>
+    <NewtonsoftJsonVersion>9.0.1</NewtonsoftJsonVersion>
     
     <!-- CoreFX -->
     <SystemCollectionsImmutableVersion>1.3.1</SystemCollectionsImmutableVersion>