VB序列化到C＃序列化

Question

I started programming in a Company where a program was written in VB. I converted it to C# because it's a much cleaner code.

In VB they did something like that:

    Class Program
        Friend Shared Sub Main(args As String())
        Dim obj As New Class1()
        Dim fs As New System.IO.FileStream("test.txt", System.IO.FileMode.OpenOrCreate)
        Dim bf As New System.Runtime.Serialization.Formatters.Binary.BinaryFormatter()
            bf.Serialize(fs, obj)
            fs.Close()

            fs = New System.IO.FileStream("test.txt", System.IO.FileMode.OpenOrCreate)
            bf = New System.Runtime.Serialization.Formatters.Binary.BinaryFormatter()
            obj = bf.Deserialize(fs)
            For Each item As String In obj.myList
                Console.WriteLine(item)
            Next
            Console.Read()
        End Sub
    End Class

    <Serializable> _
    Class Class1
        Public myList As List(Of String)
        Public Sub New()
            myList = New List(Of String)()
            myList.Add(True)
            myList.Add(False)
            myList.Add(True)
            myList.Add(False)
            myList.Add(True)
            myList.Add(False)
            myList.Add(True)
        End Sub
    End Class

But in C# the assignment of a bool to a String-Var is of course forbidden. I wrote a class in C# that is named Class1Old which includes all members as declared in VB, but when I deserialize in C# I catch the exception "String can not be converted in Boolean".

I watched in the written *.txt file and the result was very confusing:

        ÿÿÿÿ          JConsoleApplication1, Version=1.0.0.0, Culture=neutral,  
    PublicKeyToken=null   
    ConsoleApplication1.Class1   
    myListSystem.Collections.Generic.List`1[[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]
    System.Collections.Generic.List`1[[System.String, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]
    _items_size_version                       True   False                     

I can't imagine how theese 7 values are converted and reconverted.

How can I deserialize the file in C# which was written from VB?

hope somebody can help me...

EDIT:

Now I include a VB dll-project to my ptoject including the "old" code. my C#-code calls a method in the VB-code which starts deserializing. But I still receive the ArgumentException:

The object of type "System.Collections.Generic.List`1[System.String]" can not be converted to type "System.Collections.Generic.List`1[System.Boolean]".

But all arguments in the serialized class are the same type in my actual project as in my pure VB project.

So what das cause that exception??

greets Henrik

Answer 1

The assignment of a bool to a string variable is also forbidden in VB.net - unless your predecessor did not use Option Strict On. In that case your C# rant is meaninglas - the coding practice was at fault, not VB.Net.

There is no easy way to deserialize the class - I think the best way would be Bool Properties which, when set, are also creating the string variables. This would work with xml serialiazation, I am not sure that if it works with the Binary formatter.

Answer 2

If you insist on "fixing" something that isn't broken, I suppose you will need to deserialize into an intermediate "translation" class that has the list defined as Object or Boolean. This class will then output a Class1 object.