Error CS0518: Predefined type 'Microsoft.CSharp.RuntimeBinder.Binder' is not defined or imported.

Im hoping to create a list which stores several lists so I did this.                        

var temp_list = new List<dynamic>();
temp_list.Add(new List<double> 
                        {
                            1.23,
                            2.34
                        });
temp_list.Add(new List<string> 
                        {
                            "abc",
                            "def"
                        });
foreach (float item in temp_list)
                        {
                            Print(item);
                        }

However, Im getting an error: Error CS0518: Predefined type 'Microsoft.CSharp.RuntimeBinder.Binder' is not defined or imported.
What am I lacking? Im already using the ones below:

using System;
using cAlgo.API;
using cAlgo.API.Internals;
using cAlgo.API.Indicators;
using cAlgo.Indicators;
using System.Collections.Generic;

namespace cAlgo