CODEWITHSUNDEEP
c#.neteventsdelegatesnon-nullable
ruwenzori
ruwenzori

Reputation: 149

"Non-nullable event must contain a non-null value when exiting constructor"

Im getting the warning "Non-nullable event 'SomeEvent' must contain a non-null value when exiting constructor. Consider declaring the event as nullable."

Here's a very simplified version of my code which replicates the exact same problem. What am I missing here? Does this have anything to do with .Net 6?

namespace ConsoleApp3
{
    public delegate void SomeDelegate(object sender, EventArgs args);

    public class NewClass
    {
        public NewClass(string name)
        {
            this.name = name;

        }

        public string name { get; set; }

        public event SomeDelegate SomeEvent;
    }
}

Upvotes: 13

Views: 8652

Answers (2)

Michael Harvey
Michael Harvey

Reputation: 63

Initialize the property to the default.

public string name { get; set; } = default!;

Upvotes: -1

zfrank
zfrank

Reputation: 456

I know I'm late to the party, but Google sent me here, and the only responses were unsatisfactory. I came upon another answer on StackOverflow that felt a lot better, and you can get a good explanation there.

tl;dr just make the event nullable, because that's what it actually is:

public event SomeDelegate? SomeEvent;

Upvotes: 17

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