从嵌套列表的最后一层移除元素C# LINQ

public static List<object> RemoveLastElement(List<object> nestedList)
{
    if (nestedList == null || nestedList.Count == 0)
    {
        return new List<object>(); // 返回一个空列表
    }
    
    var lastElement = nestedList.LastOrDefault();
    
    if (lastElement is List<object> nested)
    {
        return nestedList.Take(nestedList.Count - 1).Concat(RemoveLastElement(nested)).ToList();
    }
    else
    {
        return nestedList.Take(nestedList.Count - 1).ToList();
    }
}

List<object> nestedList = new List<object>
{
    1,
    new List<object>
    {
        2,
        new List<object>
        {
            3,
            4
        }
    }
};

List<object> modifiedList = RemoveLastElement(nestedList);