-// cs1617.cs: Invalid option 'ISO' for /langversion; must be ISO-1 or Default
+// CS1617: Invalid -langversion option `ISO'. It must be `ISO-1', `ISO-2', `3' or `Default'
// Line: 0
-// Compiler options: -langversion:ISO
\ No newline at end of file
+// Compiler options: -langversion:ISO