MemberInfoExtensions.cs

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namespace System.Reflection;
 
public static class MemberInfoExtensions
{
    public static bool HasMetadataToken(this MemberInfo member)
    {
        ArgumentNullException.ThrowIfNull(member, "member");
        try
        {
            return member.GetMetadataTokenOrZeroOrThrow() != 0;
        }
        catch (InvalidOperationException)
        {
            return false;
        }
    }
 
    public static int GetMetadataToken(this MemberInfo member)
    {
        ArgumentNullException.ThrowIfNull(member, "member");
        int metadataTokenOrZeroOrThrow = member.GetMetadataTokenOrZeroOrThrow();
        if (metadataTokenOrZeroOrThrow == 0)
        {
            throw new InvalidOperationException(System.SR.NoMetadataTokenAvailable);
        }
        return metadataTokenOrZeroOrThrow;
    }
 
    private static int GetMetadataTokenOrZeroOrThrow(this MemberInfo member)
    {
        int metadataToken = member.MetadataToken;
        if ((metadataToken & 0xFFFFFF) == 0)
        {
            return 0;
        }
        return metadataToken;
    }
}