When I use XML serialization, there will be an extra trailing '>'

[zms9110750]

Something like this

<?xml version="1.0"?>
<ArchiveFile ...>...</ArchiveFile>>

The code I serialize

    public static bool SaveT<T>(string path, T t) where T : class
    {

        try
        {
            XmlSerializer xmlSerializer = new XmlSerializer(typeof(T));
            using var str = File.OpenWrite(path);
            xmlSerializer.Serialize(str, t);
            return true;
        }
        catch (Exception e)
        {
            Debug.Log(path + "\n" + e.Message);
            return false;
        }
    }

[zms9110750]

I use it for archiving in the game of unity.
This is saved by clicking the button manually, so it should not be caused by sudden interruption.
In addition, sometimes it will follow two '>'

[PathogenDavid]

This is happening because File.OpenWrite does not truncate the file when it opens it. That extra > isn't being written, it's left over from the previous save. (See the remarks section of the documentation for details)

You need to use File.Create instead.

[DaZombieKiller]

Alternatively, you can do stream.SetLength(0) before serializing, or stream.SetLength(stream.Position) after serializing.