-// CS1617: Invalid -langversion option `ISO'. It must be `ISO-1', `ISO-2', `3', `4', `5', `Default' or `Future'
+// CS1617: Invalid -langversion option `ISO'. It must be `ISO-1', `ISO-2', Default or value in range 1 to 7
// Line: 0
// Compiler options: -langversion:ISO