检查列表列是否存在使用SharePoint客户端对象模型？

using System;
using Microsoft.SharePoint.Client;

class Program
{
    static void Main(string[] args)
    {
        string siteUrl = "https://example.sharepoint.com/sites/mySite";
        string listTitle = "My List";
        string fieldName = "My Column";

        ClientContext clientContext = new ClientContext(siteUrl);
        List list = clientContext.Web.Lists.GetByTitle(listTitle);
        FieldCollection fields = list.Fields;

        clientContext.Load(fields);
        clientContext.ExecuteQuery();

        bool fieldExists = false;

        foreach (Field field in fields)
        {
            if (field.Title == fieldName)
            {
                fieldExists = true;
                break;
            }
        }

        if (fieldExists)
        {
            Console.WriteLine("The field exists in the list.");
        }
        else
        {
            Console.WriteLine("The field does not exist in the list.");
        }
    }
}