Coding Standards, Guidelines and Best Practices: Avoid Aysnc Void

Getting Started with Asynchronous Programming in .NET

by Filip Ekberg

Avoid Async Void

Use Async Void

Async Void is only appropriate for Event Handler

protected async void search_click( object sender, RouteEventArgs e)
{
     await GetStocks()
} 

Alternate Solution 

private async Task GetStock()

{

}

Take Away:
Async Void crashes an application or may results in 500 exception if something went wrong. As there is no way to propagate exception even you have proper try catch. 

Call GetStock()

private async void GetStock()
{
 try
{}
catch()
}