如何将多级字典分组数据提取到CSV

Question

我想将下面的pivot函数的结果提取到csv V文件中。 有没有人知道如何以更通用的方式完成这一点，而不必写太多 手动代码？在这个阶段，coulmn的名字并不重要，但是如果也可以通过从预先加载的数组或列表等中读取来动态设置...

非常感谢提前 M

public static Dictionary<TKey1,   Dictionary<TKey2,Dictionary<TKey3,Dictionary<TKey4,TValue>>>> PivotLinq<TSource, TKey1, TKey2,TKey3,TKey4, TValue>(
this IEnumerable<TSource> source, Func<TSource, TKey1> key1Selector, Func<TSource, TKey2> key2Selector, Func<TSource, TKey3> key3Selector, Func<TSource, TKey4> key4Selector,
   Func<IEnumerable<TSource>, TValue> aggregate)
    {
        return source.GroupBy(key1Selector).Select(
        x => new
        {
            X = x.Key,
            Y = x.GroupBy(key2Selector).Select(
            z => new
            {
                Z = z.Key,
                V =z.GroupBy(key3Selector).Select( 
                 w => new 
                 {
                     W=w.Key ,
                     B = w.GroupBy(key4Selector).Select(
                      c=> new 
                      {
                          C=c.Key ,
                          D=aggregate(c)
                      }).ToDictionary(e=>e.C, o=>o.D)
                 }
                      ).ToDictionary(e=>e.W, o=>o.B)
            }
                 ).ToDictionary(e=>e.Z , o=>o.V  )
            }).ToDictionary(e=>e.X,o=>o.Y);

        }