C# Main Method Async

The async Main method is a feature introduced in C# 7.1 that allows the Main entry point of a console application to be asynchronous. This is useful when you want to use await in the Main method without blocking the thread, which is cleaner and avoids potential deadlocks.

C# Main Method Async Example

The below is a basic example of main method async in C#

using System;

using System.Net.Http;

using System.Threading.Tasks;

class CSharpProgram

{

static async Task Main(string[] args)

{

Console.WriteLine("Starting async Main...");

string result = await GetWebContentAsync("https://google.com");

Console.WriteLine("Downloaded content:");

// Print first 100 chars

Console.WriteLine(result.Substring(0, 100));

}

static async Task<string> GetWebContentAsync(string url)

{

using HttpClient client = new HttpClient();

return await client.GetStringAsync(url);

}

Output

In above example:
- async Main must return Task<int> or Task (not void or Task<string>)
- await can then be used directly in Main, which avoids Task.Wait() or .Result