IQueryable IGrouping how to work

.net, generics, igrouping, iqueryable, list

Solution

No, you have a `IGrouping<int, Invoice>` as your list member.

Each grouping has a `Key` property allowing you access to the key of the group and an `IEnumerable<Invoice>` containing the grouped Invoices.

So to access it ...

IQueryable< IGrouping<int, Invoice>> List() groupedIvoices = //... get your grouping
foreach (var group in groupedIvoices ) {
    var key = group.Key;
    var invoicesInGroup = group.ToList();
}

Look at 101 Linq Samples for samples and explanations for the different Linq functions.

Problem

Original source