Change List data to IQueryable data

Change List data to IQueryable data

Public Function SortPolicyList(ByVal piNotes As List(Of PolicyDetail), ByVal piSortExpression As String) As List(Of PolicyDetail)
Dim policies As IQueryable(Of PolicyDetail)
policies = piNotes.AsQueryable() ' Change List data to IQueryable data
policies = policies.OrderBy(piSortExpression) ' Require System.Linq.Dynamic
Return policies.ToList
End Function