Empty Lists with Applied NumberFormat Throw ArgumentOutOfRangeException

[a-frazier]

If the formatter receives an empty result set to format, and the object's model has an ExcelColumn attribute applies using the NumberFormat property, the DefaultSerializer will throw an ArgumentOutOfRangeException with the message "Start cell Address must be less or equal to End cell address."

The expected result is an Excel file with only the header row.

Since XlsxDocumentBuilder.FormatColumn skips the header row by default, firstRow is 2 and RowCount is 1 since the list was empty and only the header row is output.

[jordangray]

Ah, awesome! Thanks for taking the time to write a great summary and write a fix, I appreciate it; I'll take a look and approve the PR soon.