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Just as OnGet() has an asynchronous version, OnGetAsync(), OnPost() has its own asynchronous version named OnPostAsync().

The same async/await / Task concepts apply to this method:

  • Mark the method with async
  • Define the return type as Task
  • Rename it OnPostAsync()

Instructions

1.

In Index.cshtml.cs, define an empty OnPostAsync() method.

2.

In the body of the method, use the below code to asynchronously write to a text file:

using (StreamWriter writer = new StreamWriter("log.txt", append: true))
{
  await writer.WriteLineAsync($"OnPostAsync() called at {DateTime.Now}.");
}

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