Possible null reference after null check

Question

I have a problem resolving this CS8603 warning. Even though there is a null-check for resource variable, null reference is still possible. How come?

Code:

public string GetResource(string resourcePath)
{
    var resource = Application.Current.Resources[resourcePath];
    if (resource == null)
    {
        return $"{ResourceError} [{resourcePath}]";
    }

    // ToDo: CS8603
    return resource.ToString();
}

Bill Tür stands with Ukraine · Accepted Answer · 2022-08-21 09:39:49Z

4

You did correctly check wether resource is null. But even if it is not, ToString() might return null. You can use something like

return resource.ToString() ?? "";

answered Aug 21, 2022 at 9:39

Bill Tür stands with Ukraine

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