MarcosMeli/FileHelpers — pull request #7 by csm8118 (2013-06-13 22:40:38+00:00)
Title: Support writing null values with DateMultiFormat

DateTime? fields using DateMultiFormat properly parse empty values to null, but when writing a file using this format the code would change null values to 1/1/0001. Small code change plus a test to address this.