Revert "Revert "Revert "Update SerialCheck.cs"""

This reverts commit 85aa95ef4813e605ac15b1a3b87f59c8bfed4e98.
Revert "Revert "Revert "Revert "Update SerialCheck.cs""""

This reverts commit 9ca21654d227f4da8d9d1bafaad38c9d2c732d2b.