The. NET Core Console application uses the asynchronous (Async) Main method

C # 7.1 and later allows us to use the Async Main method.

I. Create a new Console application

Two. Async Main method

We will directly change the main method to read as follows:

static async Task Main(string[] args)

You can see the error, prompting us to be a C # 7.1 feature. We have two ways to solve, in fact, the end is the same, but the operation is not the same.

1. First method-Modify the Csproj file

Open the project's csproj file and add the following code:

<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">    <LangVersion>7.1</LangVersion>  </PropertyGroup>

For example:

2. Second Method-Change project properties by vs

In the Solution Manager interface, select the project, and then right-click Properties, Build

In the popup screen, selectC# 7.1

After the above changes, no error will be made.

Three. Verification

In the main method, we add the following code to get the HTML of Baidu homepage:

class Program{    static async Task Main(string[] args)    {        var client = new HttpClient();        var result = await client.GetStringAsync("https://www.baidu.com/");        Console.WriteLine(result);        Console.ReadKey();    }}

Then run:

The code used in this article: HTTPS://GITHUB.COM/STULZQ/BLOGDEMOS/TREE/MASTER/ASYNCCONSOLEAPP

The. NET Core Console application uses the asynchronous (Async) Main method