namespace System
{
    public sealed class WeakReference<T> : ISerializable
        where T, class
    {
        [EditorBrowsable(EditorBrowsableState.Never)]
        [Obsolete("This API supports obsolete formatter-based serialization. It should not be called or extended by application code.", DiagnosticId = "SYSLIB0051", UrlFormat = "https://aka.ms/dotnet-warnings/{0}")]
        public void GetObjectData(SerializationInfo! info, StreamingContext context);
    }
}