For the following code, I receive the warning Unboxing a possibly null value. (CS8605) in VS Code with C# Dev Kit:

Original code with warning:

// Originally a struct
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
private struct POLICY_DNS_DOMAIN_INFO {
    public LSA_UNICODE_STRING Name;
    public LSA_UNICODE_STRING DnsDomainName;
    public LSA_UNICODE_STRING DnsForestName;
    public GUID DomainGuid;
    public IntPtr pSID;
}

// Additional code removed for simplicity

resultQueryPolicy = LsaQueryInformationPolicy(policyHandle,
    POLICY_INFORMATION_CLASS.PolicyDnsDomainInformation,
    out IntPtr infoStructure
);

winErrorCode = LsaNtStatusToWinError(resultQueryPolicy);

winErrorCode = LsaNtStatusToWinError(resultQueryPolicy);

if (winErrorCode == 0) {

    POLICY_DNS_DOMAIN_INFO domain = (POLICY_DNS_DOMAIN_INFO)Marshal.PtrToStructure(infoStructure, typeof(POLICY_DNS_DOMAIN_INFO));

// Additional code removed for simplicity
}

Current working solution:

// I changed the struct to a class
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
private class POLICY_DNS_DOMAIN_INFO {
    public LSA_UNICODE_STRING Name;
    public LSA_UNICODE_STRING DnsDomainName;
    public LSA_UNICODE_STRING DnsForestName;
    public GUID DomainGuid;
    public IntPtr pSID;
}

// Additional code removed for simplicity

resultQueryPolicy = LsaQueryInformationPolicy(policyHandle,
    POLICY_INFORMATION_CLASS.PolicyDnsDomainInformation,
    out IntPtr infoStructure
);

winErrorCode = LsaNtStatusToWinError(resultQueryPolicy);

if (winErrorCode == 0) {

    // I applied T?
    POLICY_DNS_DOMAIN_INFO? domain = (POLICY_DNS_DOMAIN_INFO?)Marshal.PtrToStructure(infoStructure, typeof(POLICY_DNS_DOMAIN_INFO));

// Additional code removed for simplicity
}

I’m looking for an alternative solution (hopefully simple) without having to convert the struct to a class. Is this possible?