public virtual IDarwinCoreChange GetDarwinCoreChange(
	IUserContext userContext,
	Nullable<DateTime> changedFrom,
	Nullable<DateTime> changedTo,
	Nullable<long> changeId,
	long maxReturnedChanges,
	ISpeciesObservationSearchCriteria searchCriteria,
	ICoordinateSystem coordinateSystem
)

Public Overridable Function GetDarwinCoreChange ( 
	userContext As IUserContext,
	changedFrom As Nullable(Of DateTime),
	changedTo As Nullable(Of DateTime),
	changeId As Nullable(Of Long),
	maxReturnedChanges As Long,
	searchCriteria As ISpeciesObservationSearchCriteria,
	coordinateSystem As ICoordinateSystem
) As IDarwinCoreChange

public:
virtual IDarwinCoreChange^ GetDarwinCoreChange(
	IUserContext^ userContext, 
	Nullable<DateTime> changedFrom, 
	Nullable<DateTime> changedTo, 
	Nullable<long long> changeId, 
	long long maxReturnedChanges, 
	ISpeciesObservationSearchCriteria^ searchCriteria, 
	ICoordinateSystem^ coordinateSystem
)

abstract GetDarwinCoreChange : 
        userContext : IUserContext * 
        changedFrom : Nullable<DateTime> * 
        changedTo : Nullable<DateTime> * 
        changeId : Nullable<int64> * 
        maxReturnedChanges : int64 * 
        searchCriteria : ISpeciesObservationSearchCriteria * 
        coordinateSystem : ICoordinateSystem -> IDarwinCoreChange 
override GetDarwinCoreChange : 
        userContext : IUserContext * 
        changedFrom : Nullable<DateTime> * 
        changedTo : Nullable<DateTime> * 
        changeId : Nullable<int64> * 
        maxReturnedChanges : int64 * 
        searchCriteria : ISpeciesObservationSearchCriteria * 
        coordinateSystem : ICoordinateSystem -> IDarwinCoreChange