#11: start implementing handling of enumerables for Read method

GBase/DataHandling/XmlDataReader.cs

@@ -3,6 +3,7 @@
 // Copyright(c) 2020 SimonG. All Rights Reserved.
 
 using System;
+using System.Collections;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
@@ -88,6 +89,12 @@ namespace GBase.DataHandling
                     return null;
 
                 IEnumerable<string> values = valueElements.Select(v => v.Value);
+
+                if (typeof(TProperty) != typeof(string) && typeof(TProperty).GetInterfaces().Contains(typeof(IEnumerable)))
+                {
+                    return null; //FixMe: Implement handling for IEnumerables
+                }
+
                 return values.Select(value => (TProperty)Convert.ChangeType(value, typeof(TProperty))).ToList();
             }, _cancellationToken);
         }