Upgrade the code to support .net8+

[RandallFlagg]

This is an issue in .net8+ when trying to compile the project System.Windows.Forms:

[SYSLIB0011] 'IFormatter' is obsolete: 'BinaryFormatter serialization is obsolete and should not be used. See https://aka.ms/binaryformatter for more information.' (https://aka.ms/dotnet-warnings/SYSLIB0011)

[sancheolz]

You need to add <EnableUnsafeBinaryFormatterSerialization>true</EnableUnsafeBinaryFormatterSerialization> to System.Windows.Forms.csproj