System.FormatException is a type of exception in the .NET framework. It is thrown when an invalid format is encountered while parsing a string representation of a data type. For example, if you try to parse a string that is not a valid integer representation using the int.Parse() method (string to int) , it will throw a System.FormatException. The exception indicates that the string does not conform to the expected format for the type being parsed.
To fix a System.FormatException in your code, you need to handle the exception and provide an appropriate solution based on the scenario