.NET Extension methods for object-object or dictionary-object or datatable-object mapping, single item mapping use [ item.Apply(()=>new { .. }); ],multiple array items mapping use [ items.Apply(a=>new { .. }); ]. Extension methods for SQL Window Function in Linq, use [ items.GroupBy(a =>...).AsPartition(p=> p.OrderBy(a=>...)).Over(p=>...); ],can…

When using OData $apply in a query, the response does not comply with the OData protocol. I have created a demo application to demonstrate a solution to this issue.