CRR0036 - The 'await Task.FromResult()' expression is redundant

• Jun 26, 2019

This analyzer detects statements with the await keyword that constructs a task from a literal and waits until it returns the result.

C#

async Task<string> DemoMethodAsync(CancellationToken token) {
    await DoThings();
    return await Task.FromResult("Success");
}

VB.NET

Async Function DemoMethodAsync(token As CancellationToken) As Task(Of String)
    Await DoThings()
    Return Await Task.FromResult("Success")
End Function

Such statements are redundant because they always evaluate to the passed literal and may be replaced with the literal itself.

C#

async Task<string> DemoMethodAsync(CancellationToken token) {
    await DoThings();
    return "Success";
}

VB.NET

Async Function DemoMethodAsync(token As CancellationToken) As Task(Of String)
    Await DoThings()
    Return "Success"
End Function