Server side ExistsIn attribute validation
Add missing test case for validating ExistsIn on an IEnumerable property
Tweaking ExistsIn exceptions
ExistsIn: Ensure the user specifies a valid list value property
Add positive tests covering strings in ExistsIn
ExistsIn: Always validate a submitted empty string successfully
ExistsIn: Missing test case for when a partially invalid list is submitted
ExistsIn: Add back test cases for single value validation
Allow existsin validation against submitted lists that contain null values
Merge pull request #25 from MRCollective/existsin-validation

Server side ExistsIn attribute validation