I have created windows form that acts as report loader. I have created also two RDLC reports by report wizard and it automatically created dataset for those two reports. Now
To force Visual Studio to create automatically the bindingsource, you have to create the report (.rdlc) first. With a datasource linked, when you add the component (reportviewer) and link the component with the name of the report as shown in your image, once you select the report, it will automatically create a binding source with the name that you use when you created the design.