Field in attributes changed to properties

[gimmemoore]

I have change the use of public fields in OptionAttributes and ValueList to make use of property istead.

[gsscoder]

Ouch!!! Just one problem with your changes: DefaultValue works correctly only under Visual Studio Designer.

I'm agree to evolve the API for target only property (I've accepted your pull request!), but with this design decision everything different from null, false and first item of enum must be initialized in Options class costructor.

Regards,
Giacomo

[gimmemoore]

It could also be achieve with standard properties, where a class variable hold the value of the property, and therefore the default value. This would ease the migration to Properties for current user, as you should suggest them to convert all their member with OptionAttributes, to properties using the existing fields, and of course they'll have to move the OptionAttribute to the property.

[gsscoder]

It's a minor change in favor of more object oriented design. Initializing defaults in constructor enforce a cleaner design. For now I'll leave everything this way... It's ok!

But I liked the System.ComponentModel.DefaultAttribute as idea... I'm wondering to support it as an OptionAttribute property. What do you think?

[gimmemoore]

I think that would be great, easy to understand and use, this sould definitvely be done as an OptionAttribute property!