What stores a list of data of same data type in c# code example

Example 1: c# data types

using System;
class BoxingExample
{
    static void Main()
    {
        int i = 123;
        object o = i;    // Boxing
        int j = (int)o;  // Unboxing
    }
}

Example 2: whats the main data types c#

//---DATA TYPES---//

// int or intiger stores whole numbers