How to exclude property from Json Serialization just in post method

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Closed 16 mins ago.

(Private feedback for you)

I have a class

public class Product
{
public int ProductId {get;}
public string Name {get;set;}
[ForeignKey("CategoryId")]
public int CategoryId {get; set;}
public Category Category {get;}
}

and another class

public class Category
{
public int CategoryId {get;}
public string Name {get;set;}
}

But in my body post method it appears like this

{
  "name": "Fast and furious",
  "categoryId": 2,
  "category": {
    "nome": "string"
  }
}

I would like to appears like this

 {
      "name": "Fast and furious",
      "categoryId": 2
    }