Fix IFormatter

SharpLib.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net6.0</TargetFrameworks>
+    <TargetFrameworks>net8.0</TargetFrameworks>
     <RootNamespace>lib</RootNamespace>
     <AssemblyVersion>0.0.1.0</AssemblyVersion>
     <FileVersion>0.0.1.0</FileVersion>

net/Conn.cs

@@ -1,15 +1,73 @@
 using System;
 using System.Runtime.Serialization;
-using System.Runtime.Serialization.Formatters.Binary;
 using System.Net.Sockets;
 using System.IO;
+using System.Diagnostics.CodeAnalysis;
 
 //using Util;
 
 namespace lib
 {
 
+	public interface IFormatter
+	{
+		//
+		// Summary:
+		//     Gets or sets the System.Runtime.Serialization.SerializationBinder that performs
+		//     type lookups during deserialization.
+		//
+		// Returns:
+		//     The System.Runtime.Serialization.SerializationBinder that performs type lookups
+		//     during deserialization.
+		SerializationBinder? Binder { get; set; }
+		//
+		// Summary:
+		//     Gets or sets the System.Runtime.Serialization.StreamingContext used for serialization
+		//     and deserialization.
+		//
+		// Returns:
+		//     The System.Runtime.Serialization.StreamingContext used for serialization and
+		//     deserialization.
+		StreamingContext Context { get; set; }
+		//
+		// Summary:
+		//     Gets or sets the System.Runtime.Serialization.SurrogateSelector used by the current
+		//     formatter.
+		//
+		// Returns:
+		//     The System.Runtime.Serialization.SurrogateSelector used by this formatter.
+		ISurrogateSelector? SurrogateSelector { get; set; }
 
+		//
+		// Summary:
+		//     Deserializes the data on the provided stream and reconstitutes the graph of objects.
+		//
+		//
+		// Parameters:
+		//   serializationStream:
+		//     The stream that contains the data to deserialize.
+		//
+		// Returns:
+		//     The top object of the deserialized graph.
+		[RequiresDynamicCode("BinaryFormatter serialization uses dynamic code generation, the type of objects being processed cannot be statically discovered.")]
+		[RequiresUnreferencedCode("BinaryFormatter serialization is not trim compatible because the type of objects being processed cannot be statically discovered.")]
+		object Deserialize(Stream serializationStream);
+		//
+		// Summary:
+		//     Serializes an object, or graph of objects with the given root to the provided
+		//     stream.
+		//
+		// Parameters:
+		//   serializationStream:
+		//     The stream where the formatter puts the serialized data. This stream can reference
+		//     a variety of backing stores (such as files, network, memory, and so on).
+		//
+		//   graph:
+		//     The object, or root of the object graph, to serialize. All child objects of this
+		//     root object are automatically serialized.
+		[RequiresUnreferencedCode("BinaryFormatter serialization is not trim compatible because the type of objects being processed cannot be statically discovered.")]
+		void Serialize(Stream serializationStream, object graph);
+	}
 
 
 	public interface IProcess