Error in binaryformatter

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myclass hd has 2 members, string1 and string2. I want to send the myclass data to a file test.dat using BinaryFormatter.
I could not
if BinaryFormatter is obsolete. Please let me know the alternative.

What I have tried:

C#

using System.Runtime.Serialization;
using System.Runtime.Serialization.Formatters.Binary;
using System.IO;

        BinaryFormatter formatter = new BinaryFormatter();
        FileStream output;

//hd is a class filled from 2 textBox
output = new FileStream("test.dat", FileMode.OpenOrCreate, FileAccess.Write);
formatter.Serialize(output, hd);
output.Close();

Posted 27-Aug-23 8:13am

Engineer khalid

Updated 28-Aug-23 9:14am

Deeksha Shenoy

v4

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[no name] 27-Aug-23 14:48pm

You should be focusing on the class you're trying to serialize (other than simply "commenting" that it "exists" somewhere).

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OriginalGriff · Answer 1 · 2023-08-27T09:16:00

BinaryFormatter is obsolete, and as the documentation clearly says, you shouldn't be using it in new projects: BinaryFormatter.Serialize Method (System.Runtime.Serialization.Formatters.Binary) | Microsoft Learn[^]

This suggests some alternatives: Deserialization risks in use of BinaryFormatter and related types | Microsoft Learn[^]

If there is a reason why you absolutely need a binary output (compatibility with some other software or hardware for example) then this may help: ByteArrayBuilder - A StringBuilder for Bytes[^]