Why "await" is not awaiting?

Following is the code which we should be writing to fulfill your conditions:

async Task<List<int>> Counting()
{
    Console.WriteLine("....something else...Started");
    List<int> nums = new List<int>();
    for (int i = 0; i < 100; i++)
    {
        // Thread.Sleep(100);
        await Task.Delay(100);
        nums.Add(i);
    }
    Console.WriteLine(".....something else...Done");
    return nums;
}
public async void AsyncAndAwait()
{
    Console.WriteLine("AsyncAndAwait starting...");
    Task<List<int>> task = Counting();
    Console.WriteLine("Doing something else...");
    List<int> list = task.Result;
    Console.WriteLine("I am done!!!");
}

public void RunTest()
{
    AsyncAndAwait();
}

I can see few reasons why your code is not giving desired behaviors:

1. Just putting async while declaring method does not make it asynchronous method. There must be await inside it. As stated at MSDN page : "If the method that the async keyword modifies doesn't contain an await expression or statement, the method executes synchronously." That's why instead of "Thread.Sleep(100)" I used "await Task.Delay(100)".

2. Just by writing "var task = Counting()", you are calling "Counting" method on same thread. if you will not use await keyword it is a blocking call. As stated at MSDN page : "An await expression does not block the thread on which it is executing." For more please visit:

http://stackoverflow.com/questions/23022573/calling-async-methods-from-a-synchronous-context[^]

Hope it will help. Thanks.