linq syntax


I just downloaded linqpad and am trying to do the first test. The language I selected is C# expression. The linq query is as followed,

from p in Patients where p.patDOBirth > new DateTime(2010, 1, 1) group p by p.patGender into genderGroup
select new PatientGroup() {
name = genderGroup.patOthername + ' ' + genderGroup.patSurname,
Count = genderGroup.Count()

I got error messages

1) The type or namespace name 'PatientGroup' could not be found (press F4 to add a using directive or assembly reference)

2) model doesn't contain patOthername

3) model doesn't contain patSurname

The patOthername and patSurname do exist.

Thank you!


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