Select 1 field and group by it (my query isnt working)

My query below, what im trying to do is get all the records with that quoteID and then group by that ID

  var CurSuppliers = db.Quotes_Items_Suppliers.Where(i => i.QuoteID == QuoteID).Select(t => t.SupplierID).GroupBy(t => t).ToList();

I knew i had to only select the 1 field as LINQ would not know how to group if there were more fields with different values.

so im just trying to get some grouped IDs i can loop through, at the moment when i do a foreach on the below i get 

strCurSupps = "System.Data.Objects.ELinq.InitializerMetadata+Grouping`2[System.Int32,System.Int32],System.Data.Objects.ELinq.InitializerMetadata+Grouping`2[System.Int32,System.Int32]"
Jon Skeet
people
quotationmark

Yes, you're getting a list of groups. When you iterate over that, each element of the iteration will be a group - which you can also iterate over. For example:

foreach (var group in currentSuppliers)
{
    Console.WriteLine("Group key: {0}", group.Key);
    foreach (var element in group)
    {
        Console.WriteLine("  Element: {0}", element);
    }
}

However, it's not clear what you're hoping to achieve to be honest - you're just going to get a sequence of groups, each of which will consist of a bunch of identical elements, because you're just getting the supplier ID. If you want the whole supplier, you need to get rid of the Select(t => t.SupplierID) and instead just use GroupBy(t => t.SupplierID). Even then, you'll have a sequence of groups, each of which will contain several objects with the same SupplierID and the same QuoteID, presumably representing the same entity.

people

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