C#将对象保存为文件报错

类和打开保存文件的代码我都贴出来了, 报错:

程序集“VariableEditor, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null”中的类型“VariableEditor.VariableEditorMain”未标记为可序列化。

网上的序列化的方法我也试了,好像没什么卵用
请高手指教!

//数据存放类
public class VariableEditorMain
{
    public Dictionary<string, string> dicVariables;
    public RichTextBox rtbTextArea;
    public DataSet dsTables;
    public void InitData()
    {
        dicVariables = new Dictionary<string, string>();
        rtbTextArea = new RichTextBox();
        dsTables = new DataSet();
    }
}

/// <summary>
/// 保存文件
/// </summary>
public void SaveFile(string FilePath, object obj)
{
    try
    {
        FileStream fs = new FileStream(FilePath, FileMode.Create);
        BinaryFormatter sl = new BinaryFormatter();
        sl.Serialize(fs, obj);
        fs.Close();
    }
    catch (Exception e)
    {
        MessageBox.Show("序列化存储失败！" + e.Message);
    }
}

/// <summary>
/// 打开文件
/// </summary>
public object OpenFile(string FilePath)
{
    object objInstance = new object();
    if (System.IO.File.Exists(FilePath))
    {
        try
        {
            FileStream fs = new FileStream(FilePath, FileMode.Open);
            BinaryFormatter bf = new BinaryFormatter();
            objInstance = bf.Deserialize(fs);
            fs.Close();
        }
        catch(Exception e)
        {
            MessageBox.Show("打开文件失败！" + e.Message);
        }
    }
    return objInstance;
}

https://www.cnblogs.com/hzzhao/p/5264664.html

你需要在你准备序列化的类上面加上可序列化描述 加上这个就好了[Serializable]

//数据存放类
[Serializable]
public class VariableEditorMain