Query datatable using linq to get count order by

Question

I have a DataTable something like shown below. i need to query it using linq

Something like this Query in linq

select B, Count(C)
from DataTable
group by B

Answer 1

Try this:

db.DataTable
    .GroupBy(x => x.B)
    .Select(new { B = x.Key, CountC = x.Count(y => y.C) });

Answer 2

Try this:

var qry = datatable1.AsEnumerable()
    .GroupBy(a=>a.Field<type>("FieldB"))
    .Select(grp=>new
          {
             value = grp.Key,
             count = grp.Count(c=>c.Field<type>("FieldC"))
          });

Replace type with proper data type, such as: int , string , etc.