using System.Collections.Generic
//type is your data type (Ej. int, string, double, bool...)
List<type> newList = new List<type>();

IList<int> newList = new List<int>(){1,2,3,4};

var list = new List<string> {
  "test1",
  "test2",
  "test3"
};

C# By Magnificent Mamba on Dec 23 2019
IList<int> newList = new List<int>(){1,2,3,4};

List<string> names = new List<string>();List<Object> someObjects = new List<Object>();

var list = new List<string> { "test1", "test2", "test3" };