more changes

Author: ajaybhargavb

src/Microsoft.AspNet.Mvc.Core/SessionStateTempDataProvider.cs

@@ -100,9 +100,13 @@ internal void EnsureObjectCanBeSerialized(IDictionary<string, object> values)
                 {
                     itemType = itemType.GetElementType();
                 }
-                else if (TypeHelper.IsCollectionType(itemType))
+                else if (itemType.IsGenericType)
                 {
-                    actualTypes = itemType.GetGenericArguments();
+                    if (itemType.ExtractGenericInterface(typeof(IList<>)) != null ||
+                        itemType.ExtractGenericInterface(typeof(IDictionary<,>)) != null)
+                    {
+                        actualTypes = itemType.GetGenericArguments();
+                    }
                 }
 
                 actualTypes = actualTypes ?? new Type[] { itemType };

test/Microsoft.AspNet.Mvc.Core.Test/SessionStateTempDataProviderTest.cs

@@ -130,6 +130,7 @@ public static TheoryData<string, object> ValidTypes
                     { "SimpleDict", new Dictionary<string, int>() },
                     { "Uri", new Uri("http://Foo") },
                     { "Guid", Guid.NewGuid() },
+                    { "SimpleList", new List<string> { "foo", "bar" } }
                 };
             }
         }