Many of the read methods in the Qi Client Library have additional overloads that assist with indexing into a stream when it is inconvenient or difficult to convert the index into a string. Using generics, the overloads allow the caller to indicate the type of the index and then use the type for the index parameter(s) in the call. Similarly the read methods have overloads that use tuples that are also accepted for the indexing instead of a string.
The following example uses GetRangeValues( ) to return a list of up to 100 events
from streamId starting 30 minutes ago:
List< SimpleTypeClass > readEvents;
String startindex = DateTime.UtcNow.AddMinutes(-30).ToString("o");
readEvents = _service.GetRangeValues< SimpleTypeClass >(namespaceId, streamId, startindex, 100).ToList();
GetRangeValues( ) also has overloads defined that include a skip parameter
which makes multiple calls and retrievals from different sets of data after a
specified time stamp.