CA1062 is thrown after updating to !! parameter null checking

Question

According to CA1062 null checks are required in externally visible methods like this:

public static double GetLongitude(this Location location)
{
    if(location is null)
    {
        throw new ArgumentNullException(nameof(location));
    }

    return location.Longitude;
}

I have now updated to .net 6.0 and tried to use the parameter null check ":!":

public static double GetLongitude(this Location location!!) => location.Longitude;

But this thrown CA1062 again.

Hope you guys can help me:-)

Answer 1

C# 10/.NET 6 中没有这样的运算符。 参数空值检查是对即将到来的 C# 11 的提议，由于开发人员在 2022 年 4 月的反对，该提议最终被推迟。