Group by two columns in linq

Question

Hi
I want to group the above list of stores in this case. The above is a List(of Stores) and I want create a new list of stores where they are all grouped by FromStore and ToStore .

Example:

Dim Test As List(Of Stores) = MyTStores.GroupBy(Function(x) x.ToStore).[Select](Function(grp) grp.First()).ToList()

This example only group by one columns and not two.

Answer 1

.GroupBy(Function(X) New With {X.FromStore, X.ToStore})

或仅此，如果您不关心后续处理中的密钥：

.GroupBy(Function(X) X.FromStore & "-" & X.ToStore)