Question

I have a class.

public class Compaints
{
    public string CustomerNumber{get; set;},

    public string Complaint{get; set} 
}

I have a list of complaints. I need to group by customerNumber and add it to dictionary say of type
Dictionary<string, int> – string will be customer number and int will be count.

How to do this in linq?

Thanks.

Answer 1

var countByCustomer = complaints.GroupBy(row => row.CustomerNumber)
    .ToDictionary(grp => grp.Key, grp => grp.Count());