diff --git a/aspnetcore/mvc/models/model-binding.md b/aspnetcore/mvc/models/model-binding.md
index f47b585daa..d321dde2c6 100644
--- a/aspnetcore/mvc/models/model-binding.md
+++ b/aspnetcore/mvc/models/model-binding.md
@@ -342,7 +342,15 @@ For targets that are collections of simple types, model binding looks for matche
   [a]=1050&[b]=2000&index=a&index=b
   ```
 
-* The following format is supported only in form data:
+ Avoid binding a parameter or a property named `index` or `Index` if it is adjacent to a collection value. Model binding attempts to use `index` as the index for the collection which might result in incorrect binding. For example, consider the following action:
+  
+  ```csharp
+  public IActionResult Post(string index, List<Product> products)
+  ```
+  In the preceding code, the `index` query string parameter binds to the `index` method parameter and also is used to bind the product collection. Renaming the `index` parameter or using a model binding attribute to configure binding avoids this issue:
+  ```csharp
+  public IActionResult Post(string productIndex, List<Product> products)
+  ```
 
   ```
   selectedCourses[]=1050&selectedCourses[]=2000
@@ -967,6 +975,18 @@ For targets that are collections of simple types, model binding looks for matche
   [a]=1050&[b]=2000&index=a&index=b
   ```
 
+   Avoid binding a parameter or a property named `index` or `Index` if it is adjacent to a collection value. Model binding attempts to use `index` as the index for the collection which might result in incorrect binding. For example, consider the following action:
+  
+  ```csharp
+  public IActionResult Post(string index, List<Product> products)
+  ```
+
+  In the preceding code, the `index` query string parameter binds to the `index` method parameter and also is used to bind the product collection. Renaming the `index` parameter or using a model binding attribute to configure binding avoids this issue:
+
+  ```csharp
+  public IActionResult Post(string productIndex, List<Product> products)
+  ```
+
 * The following format is supported only in form data:
 
   ```