C#

[Serializable]
public class Type1
{
    public int abc;
}

[Serializable]
public class Type2
{
    public int cba;
}

public class Program
{
    static void Main(string[] args)
    {
        Type1 input = new Type1();
        input.abc = 12345;
        Type2 output = new Type2();

        IFormatter formatter = new BinaryFormatter();
        Stream stream = new FileStream("output.bin", FileMode.Create, FileAccess.Write, FileShare.None);
        formatter.Serialize(stream, input);
        stream.Close();

        stream = new FileStream("output.bin", FileMode.Open, FileAccess.Read, FileShare.None);
        output = (Type2)formatter.Deserialize(stream);

        return;
    }
}