Question

I have a class with properties: Row, Seat.
For example we have the following data:

Row Seat
1    1
1    2
1    3
2    4
2    5

I want return Dictionary<int,int> that contain Row as key, and numbers of seats in row as value.
For above example the dictionary will contain two records:

Key Value
1    3
2    2

How can I do this?
Thanks.

Answer 1

list.GroupBy(x => x.Row)
    .ToDictionary(x => x.Key, x => x.Count());