@@ -18,7 +18,7 @@ public static class RuntimeData
 
         public readonly static Func<IFormatter> DefaultFormatterFactory = () =>
         {
-            var fw = RuntimeInformation.FrameworkDescription;
+            var fw = RuntimeInformation.FrameworkDescription ?? "undefined";
             if (fw.StartsWith(".NET Framework") || fw.StartsWith("Mono"))
             {
                 try
Original file line number	Diff line number	Diff line change
`@@ -18,7 +18,7 @@ public static class RuntimeData`
`18`	`18`
`19`	`19`	`public readonly static Func<IFormatter> DefaultFormatterFactory = () =>`
`20`	`20`	`{`
`21`		`- var fw = RuntimeInformation.FrameworkDescription;`
	`21`	`+ var fw = RuntimeInformation.FrameworkDescription ?? "undefined";`
`22`	`22`	`if (fw.StartsWith(".NET Framework") \|\| fw.StartsWith("Mono"))`
`23`	`23`	`{`
`24`	`24`	`try`