ISerializationSurrogate.cs

using System.Runtime.InteropServices;
using System.Security;

namespace System.Runtime.Serialization
{
    [ComVisible(true)]
    public interface ISerializationSurrogate
    {
        [SecurityCritical]
        void GetObjectData(object obj, SerializationInfo info, StreamingContext context);

        [SecurityCritical]
        object SetObjectData(object obj, SerializationInfo info, StreamingContext context, ISurrogateSelector selector);
    }
}