Add support for Indexed Dtos ...

Extensions/XModelExtensions.cs

@@ -1,3 +1,6 @@
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
 using xCommons.Extensions;
 using xModels.Dtos;
 
@@ -30,5 +33,12 @@ namespace xModels.Extensions
             //
             return isSame;
         }
+
+        public static IEnumerable<T> AsEnumerable<T, TIndex>(
+            this IEnumerable<XBaseIndexedDto<T, TIndex>> source
+        )
+        {
+            return source.Select(i => i.Item);
+        }
     }
 }