Make ICollection behave the same a IEnumerable

Author: WimAtIHomer

src/ServiceStack.Text/Common/JsWriter.cs

@@ -413,7 +413,7 @@ private WriteObjectDelegate GetCoreWriteFn<T>()
                 }
             }
 
-            var isDictionary = typeof(T) != typeof(IEnumerable) 
+            var isDictionary = typeof(T) != typeof(IEnumerable) && typeof(T) != typeof(ICollection)
                 && (typeof(T).AssignableFrom(typeof(IDictionary)) || typeof(T).HasInterface(typeof(IDictionary)));
             if (isDictionary)
             {
@@ -462,4 +462,4 @@ public void WriteType(TextWriter writer, object value)
         }
 
     }
-}
+}