Task.Run()

Scenario:

From MSDN:

For I/O-bound code, you await an operation that returns a Task or Task<T> inside of an async method.

For CPU-bound code, you await an operation that is started on a background thread with the Task.Run method.

You can use Task.Run to move CPU-bound work to a background thread, but a background thread doesn't help with a process that's just waiting for results to become available.

Solution:

 
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using System;
using System.Threading.Tasks;

namespace ConsoleApplication1
{
    class ProgramTaskRun
    {
        static async Task Main(string[] args)
        {
            while (true)
            {
                ProcessData();

                string data = Console.ReadLine();
                Console.WriteLine($"You entered: {data}");
            }
        }

        private static async void ProcessData()
        {
            int result = await Task.Run(() => GenerateData());
            Console.WriteLine("Process: " + result);
        }

        private static int GenerateData()
        {
            int size = 0;
            for (int i = 0; i < 100; i++)
            {
                for (int j = 0; j < 1000000; j++)
                {
                    string value = j.ToString();
                    size += value.Length;
                }
            }
            return size;
        }
    }
}