UnitySerializationHolder.cs

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using System.Runtime.Serialization;
 
namespace System;
 
[Serializable]
public sealed class UnitySerializationHolder : ISerializable, IObjectReference
{
    private readonly int _unityType;
 
    private readonly string _data;
 
    internal static void GetUnitySerializationInfo(SerializationInfo info, int unityType)
    {
        info.SetType(typeof(UnitySerializationHolder));
        info.AddValue("Data", null, typeof(string));
        info.AddValue("UnityType", unityType);
        info.AddValue("AssemblyName", string.Empty);
    }
 
    public UnitySerializationHolder(SerializationInfo info, StreamingContext context)
    {
        if (info == null)
        {
            throw new ArgumentNullException("info");
        }
        _unityType = info.GetInt32("UnityType");
        _data = info.GetString("Data");
    }
 
    public void GetObjectData(SerializationInfo info, StreamingContext context)
    {
        throw new NotSupportedException(SR.NotSupported_UnitySerHolder);
    }
 
    public object GetRealObject(StreamingContext context)
    {
        if (_unityType != 2)
        {
            throw new ArgumentException(SR.Format(SR.Argument_InvalidUnity, _data ?? "UnityType"));
        }
        return DBNull.Value;
    }
}