type conflicts are caused because the Telerik.Charting
assembly is merged to the Telerik.Reporting
assembly therefore the types exist simultaneously in two locations. This problem will be fixed with the next release of the Reporting
At this moment there is only one solution to the problem. You should build the charts and the reports that contain charts in different projects. I'm attaching a sample solution that illustrates the idea. You may need to re-add the referenced assemblies.
the Telerik team