using System;

using System.Threading.Tasks;

​

public class Program

{

    public static void Main()

    {

        RunAsync().Wait(); 

    }

    public static async Task RunAsync()

    {

        var task = NumberAsync(10);

        var val1 = await task;

        Console.WriteLine(val1); 

        var val2 = await task;

        Console.WriteLine(val2); 

    }

    public static async Task<int> NumberAsync(int n){

        await Task.Delay(100);

        return n; 

    }

}