Feature Request: Add a "DefaultValue" decorator.

[du8die]

For example, when an expected integer value contains no value ("") a WrongDataFormatException is thrown.

Can a "DefaultValue" decorator be added, where, when a NoValue is encountered, instead of throwing the exception, a default value could be specified?

[CsvColumn(DefaultValue = -1)] public int SomeProperty { get; set; }

[mperdeck]

I can see the business case for this. If you decide to go ahead and build this, please send me a pull request.