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Update aspnetcore/mvc/models/model-binding.md 

Co-authored-by: Pranav K <prkrishn@hotmail.com>
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Bruno Oliveira 2021-12-02 14:12:14 -08:00 committed by GitHub
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@ -967,7 +967,10 @@ For targets that are collections of simple types, model binding looks for matche
[a]=1050&[b]=2000&index=a&index=b [a]=1050&[b]=2000&index=a&index=b
``` ```
> [!WARNING] > [!WARNING]
> Since the model binding looks for the keyword `index` from a Form or Query string is strongly recommended to not use it as your action's parameter name to avoid unexpected behaviors. > Avoid binding a parameter or a property named `index` or `Index` if it is adjacent to a collection value. Model binding will attempt to use it 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)
* The following format is supported only in form data: * The following format is supported only in form data: