Possible null reference return in ASP.NET Core [duplicate]

Question

I'm getting this warning:

I want to remove this warning.

Sanjay Sahani · Accepted Answer · 2022-12-25 07:03:46Z

2

What happens when it does not find any item with the email address? it will simply return null. So, you have to tell this method caller that it could also return null and in order to do so, you will simply have to make the return type nullable by appending ? as shown below.

public User? GetUserByEmail(string email)
{
    return _users.SingleOrDefault(u => u.Email == email);
}

answered Dec 25, 2022 at 7:03

Sanjay Sahani

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Pandurang Choudekar · Accepted Answer · 2022-12-25 08:06:14Z

2

remove following tag in .csproj file

<Nullable>enable</Nullable>

answered Dec 25, 2022 at 8:06

Pandurang Choudekar

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Hossein Narimani Rad · Accepted Answer · 2022-12-25 06:33:02Z

-2

Similar to this post, you can remove any warning having its code by adding these lines in your csproj:

<PropertyGroup>
   <NoWarn>8603</NoWarn>
</PropertyGroup>

Also you may fix it using editorconfig

# CS8603: Possible null reference assignment.
dotnet_diagnostic.CS8603.severity = none

edited Dec 25, 2022 at 6:33

answered Dec 25, 2022 at 6:27

Hossein Narimani Rad

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2 Comments

Hans Keﬆing Over a year ago

... defeating the purpose of Nullable Reference Types

Hossein Narimani Rad Over a year ago

@HansKeﬆing just giving what SO want.

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