SHOW SERIAL NUMBER IN RDLC REPORT

may be you need to show serial number in your rdlc report then you can use following syntax for showing 1,2,3... continuous on in table field

=RowNumber(Nothing)

and if you want to re-generate serial number for each  group in rdlc then you can use following syntax

   =RowNumber("table1_Group1")

where table1_Group1 is group name . 

Thanks