异步等待调用在我的控制台应用程序中无法正常工作

Question

Async await call is not working properly in my code.

static void Main(string[] args)
{
    // Start the HandleFile method.
    Task<int> task = HandleFileAsync();

    // Control returns here before HandleFileAsync returns.
    // ... Prompt the user.
    Console.WriteLine("Please wait patiently " +
        "while I do something important.");

    // Do something at the same time as the file is being read.
    string line = Console.ReadLine();
    Console.WriteLine("You entered (asynchronous logic): " + line);

    // Wait for the HandleFile task to complete.
    // ... Display its results.
    task.Wait();
    var x = task.Result;
    Console.WriteLine("Count: " + x);

    Console.WriteLine("[DONE]");
    Console.ReadLine();
}

static async Task<int> HandleFileAsync()
{
    string file = @"C:\testfile.txt";
    Console.WriteLine("HandleFile enter");
    int count = 0;

    // Read in the specified file.
    // ... Use async StreamReader method.
    using (StreamReader reader = new StreamReader(file))
    {
        string v = await reader.ReadToEndAsync();

        // ... Process the file data somehow.
        count += v.Length;

        // ... A slow-running computation.
        //     Dummy code.
        for (int i = 0; i < 10000; i++)
        {
            int x = v.GetHashCode();
            if (x == 0)
            {
                count--;
            }
        }
    }
    Console.WriteLine("HandleFile exit");
    return count;
}

Its expected output should be

HandleFile enter

Please wait patiently while I do something important

HandleFile exit

but output is coming

HandleFile enter

HandleFile exit

Please wait patiently while I do something important

Answer 1

Your question have no issue, I checked It by running your code in my PC. Please once again check your console application creating method. If there is problem, please share the detail of creating your application method as well.