public IReadOnlyDictionary<long,string> Validate( 
   QueryFilter filter
)

Public Overloads Function Validate( _
   ByVal filter As QueryFilter _
) As IReadOnlyDictionary(Of Long,String)

A readonly dictionary that holds zero or more key/value pairs where the existence of each key represents the object ID of the row that fails to valiate and the value represents the corresponding error message. If validation succeeds, the returned readonly dictionary is empty.