User-1185172246 posted
You must read RDLC specification and then create the report using C# or VB. As RDLC is simple XML behind the scenes, then only hard task is to learn RDLC spec. As a short term solution, you could create a RDLC report in VS using visual editor with 2 columns,
then save, then open it with Notepad to analyze the XML generated... then create the same report with 5 columsn, and see how those cols are added into the XML, etc. In doing that, you would have a basic XML report code to start with.