Store N Number of Lists of Different Types in a Single Generic List in C#

We can store n number of lists of different types in a single generic list by creating a list of list of objects as shown below.

List<List<object>> list = new List<List<object>>();

Example

 Live Demo

using System;
using System.Collections.Generic;
namespace MyApplication{
   public class Program{
      public static void Main(){
         List<List<object>> list = new List<List<object>>();
         List<object> list1 = new List<object>();
         list1.Add(101);
         list1.Add(102);
         list1.Add(103);
         list.Add(list1);
         List<object> list2 = new List<object>();
         list2.Add("Test1");
         list2.Add("Test2");
         list2.Add("Test3");
         list.Add(list2);
         foreach (List<object> objectList in list){
            foreach (object obj in objectList){
               Console.WriteLine(obj);
            }
            Console.WriteLine();
         }
      }
   }
}

Output

The output of the above code is as follows.

101
102
103
Test1
Test2
Test3