C# 如何阻止代码在集合序列化期间循环导致计算器溢出

我有一个包含多个嵌套集合对象的 ContactForm 对象。当我尝试序列化对象时，代码卡在 SectionCollectionObject 中的循环中。

这是执行 serialize() 调用的代码:

public static ContactForm SaveForm(ContactForm cf) 
{ 
    if (cf != null) 
    {   
        XmlSerializer xs = new XmlSerializer(cf.GetType()); 
        StringBuilder sb = new StringBuilder(); 
        using (StringWriter sw = new StringWriter(sb)) 
        { 
            xs.Serialize(sw, cf); 
        } 
    } 
    // ... 
} 

程序在“get”语句处陷入循环，直到抛出 StackOverflowException。需要更改或添加什么代码才能通过这一点？

这是 SectionObjectCollection 类:

[Serializable, XmlInclude(typeof(Section))] 
public sealed class SectionObjectCollection : Collection<Section> 
{ 
    public Section this[int index] 
    {             
        get { 
            return (Section)this[index]; //loops here with index always [0] 
        } 
        set { 
            this[index] = value; 
        } 
    } 
} 

这里是集合类继承自的 Section 类:

public class Section 
{ 
    public Section()  
    { 
        Questions = new QuestionObjectCollection(); 
    } 
 
    public int SectionDefinitionIdentity {get;set;} 
    public string Name {get;set;} 
    public string Description {get;set;} 
    public bool ShowInReview {get;set;}  
    public int SortOrder {get;set;} 
 
    public QuestionObjectCollection Questions 
    { 
        get; 
        private set; 
    }    
}  

请您参考如下方法:

无论您是否在序列化上下文中使用它，您的索引器将始终无限循环。您可能想像这样调用其中的基本索引器:

public Section this[int index] 
{             
    get { 
        return (Section)base[index]; //loops here with index always [0] 
    } 
    set { 
        base[index] = value; 
    } 
}