Need Linq for Find duplicate data and merge the corresponding data of other cell

[ppr (Peter Preuss)]

your excel is different to the provided sample from above, therefore the grouping goes different

what are all the columns you want to group by the data?

Also have a look here:

[HowTo] Overview on different options for grouping data and processing the groups

This HowTo introduces on the different options for grouping data from a datatable in order to process the grouped data. Introduction Grouping data and processing the grouped data is a common scenario e.g. when the grouped data is to aggregate like summing up, find maximum, get the average or concatening items. Lets have a look on following data: [grafik] A possible scenario could be: Create a report containing following information: the region code the sum of CaseCount per RegionCode t…