Type.GetMember is not finding AsEnumerable

The type System.Data.DataTable, when calling GetMembers, does not return AsEnumerable in the results.

To confirm this, I ran:

          Dim Query = From MemberInfo As MemberInfo 
                      In GetType(DataTable).GetMembers 
                      Select MemberName = MemberInfo.Name 
                      Order By MemberName 
          For Each MemberName As String In Query.ToList
            Debug.WriteLine(MemberName)
          Next

Note that System.Data.DataSetExtensions is added as a reference, and there is a "using" (Imports) for System.Data

I am looking for the right code to get the MemberInfo for AsEnumerable.

Also note that I will not know the Type at runtime, I'm just using this as a concrete example, so I can't hard-code the solution for DataTable. I do realize the problem lies elsewhere, is not specific to DataTable methods, but I think by concrete example of a problem / solution I can extrapolate that to work with every Type.