Question

please consider this code:

var result = data
        .GroupBy(a => groupA.Contains(a.Group) ? "A" : 
                      groupB.Contains(a.Group) ? "B" : 
                      "N/a")
        .Select(a => new
        {
            KEY = a.Key,
            VALUE = a.Count()
        });

can any one help how to convert GroupBy to LINQ version?

thanks

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Edit 1)

I want this style:

from a in ....
group a by ....
select ...

Answer 1

you can try somethink like this but I would stick to what you have if it works

 var result=   from p in data
    group p by new 
   { Criterion = p.Contains(p.Group) ? "A" : p.Contains(p.Group) ? "B" : "N/a" } 
    into g  select new {KEY = g.Key, VALUE = g.Count()};