Before calling my report, I generate a generic list of business objects. The processing is quite complex and I do not want to try to use Telerik's parameter facility to do this. 

How can I pass this List<BusinessObject> to Telerik Reporting at runtime? What do I use as a datasource in order to design the report?

Hi Lars,

For backwards compatibility reasons Telerik Reporting supports binding directly to IEnumberable/IListSource objects (incl. arrays, collections, DataSet, DataTable, DataView, DbDataAdapter), so you can bind directly to your List. However instead you might consider using the ObjectDataSource that can handle this types of data sources.

As for the design time support, check out the following help article: Working With Data at Design Time.

All the best,
Steve
the Telerik team