C# SharePoint身份验证失败

我正在尝试访问我的SharePoint（例如：https://exampleSharpoint.com）web服务以获取一些信息，但它会在代码中提供这些信息

我的web配置：

<security mode="Transport">
    <transport clientCredentialType="Ntlm"/>
</security>

它将在最后一行“客户端身份验证方案'Ntlm'禁止HTTP请求”抛出异常。请提供任何建议

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注意：我使用的是SharePoint的最新版本，它与SharePoint的早期版本配合得很好

您应该通过寻找更好的日志来深入研究这个问题。以下文档可能会对此有所帮助：请提供任何解决方案：(

listService.Endpoint.Address = 
    new System.ServiceModel.EndpointAddress(scolurl + "/_vti_bin/Lists.asmx");
if (_userName != null)
{
    listService.ClientCredentials.Windows.ClientCredential = new System.Net.NetworkCredential(_userName, _passWord, _domain);
    //listService.ClientCredentials.UserName.UserName = _userName;
    //listService.ClientCredentials.UserName.Password = _userName;
}
else
{
    listService.ClientCredentials.Windows.ClientCredential = System.Net.CredentialCache.DefaultNetworkCredentials;
}

XmlDocument doc = new XmlDocument();
doc.LoadXml(query);

XmlNode queryNode = doc.SelectSingleNode("//Query");
XmlNode viewNode = doc.SelectSingleNode("//ViewFields");
XmlNode optionNode = doc.SelectSingleNode("//QueryOptions");
try
{
XmlNode retNode = listService.GetListItems("My Project", null, queryNode, viewNode, null, optionNode, null);