VSTO Visio加载项SolutionXmlElement错误

using System.Xml;
using System.Xml.Schema;

public bool ValidateXml(string xmlFilePath, string schemaFilePath)
{
    XmlReaderSettings settings = new XmlReaderSettings();
    settings.ValidationType = ValidationType.Schema;
    settings.Schemas.Add(null, schemaFilePath);

    using (XmlReader reader = XmlReader.Create(xmlFilePath, settings))
    {
        try
        {
            while (reader.Read()) { }
            return true;
        }
        catch (XmlException ex)
        {
            Console.WriteLine("XML validation error: " + ex.Message);
            return false;
        }
    }
}

using System.Xml.Linq;

public void FixXmlElements(string xmlFilePath)
{
    XDocument doc = XDocument.Load(xmlFilePath);
    var elements = doc.Descendants("SolutionXmlElement");

    foreach (var element in elements)
    {
        // 添加缺失的元素或修复错误的元素
        if (!element.HasElements)
        {
            element.Add(new XElement("MissingElement", "DefaultValue"));
        }
        // 更多修复逻辑...
    }

    doc.Save(xmlFilePath);
}