* Rename file to match class name

* Minor redundant code removal

Src/CommandLine.cs → Src/CommandLineParser.cs

@@ -289,7 +289,7 @@ private static object parseCommandLine(string[] args, Type type, int i, Func<Con
                                     ?? throw new UnrecognizedCommandOrOptionException(commandName, getHelpGenerator(type, helpProcessor));
                                 return enumField.GetRawConstantValue();
                             })
-                        }).AsEnumerable();
+                        });
 
                     object prev = null;
                     string prevOptionOrCommand = null;