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Warning CS8618 Non-nullable property 'Categories_List' must contain a non-null value when exiting constructor. Consider declaring the property as nullable. RazorPageDemoYoutube D:\ASP.NET\RazorPage\RazorPageDemo\RazorPageDemoYoutube\Pages\Admin\Categories\Index.cshtml.cs 16 Active

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Qing Guo
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Amila Praneeth
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  • In constructor just do Categories_List= new List – D A May 19 '23 at 05:38
  • You can use the `?` suffix to declare a nullable reference type. Try to add `?` ,like `public IEnumerable? Categories_List { get; set; }` . – Qing Guo May 19 '23 at 05:39
  • The Warning includes the answer to your question How to fix: *Consider declaring the property as nullable.* – Sir Rufo May 19 '23 at 05:51

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Try to add ? ,like :

public IEnumerable<Category>? Categories_List { get; set; }

OR:

public IEnumerable<Category> Categories_List { get; set; } = new List<Category>();
Qing Guo
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