The FormatSecondsLong method is a static extension method in the SandboxSystemExtensions class. It is used to convert a given number of seconds, represented as a 64-bit integer (Int64), into a human-readable string format. This method is particularly useful for displaying time durations in a more understandable format, such as converting seconds into hours, minutes, and seconds.

To use the FormatSecondsLong method, you need to pass a 64-bit integer representing the number of seconds you want to format. The method will return a string that represents the time duration in a human-readable format.

Example usage:

long seconds = 3661;
string formattedTime = SandboxSystemExtensions.FormatSecondsLong(seconds);
// formattedTime will be "1 hour, 1 minute, 1 second"