Suppress warning CS1998: This async method lacks 'await'

Question

I\'ve got an interface with some async functions. Some of the classes that implements the interface does not have anything to await, and some might just throw. It\'s a b

Answer 1

It might be occured cs1998 below.

public async Task<object> Foo()
{
    return object;
}

Then you can reform below.

public async Task<object> Foo()
{
    var result = await Task.Run(() =>
    {
        return object;
    });
    return result;
}

Answer 2

Here is some alternatives depending on your method signature.

    public async Task Test1()
    {
        await Task.CompletedTask;
    }

    public async Task<object> Test2()
    {
        return await Task.FromResult<object>(null);
    }

    public async Task<object> Test3()
    {
        return await Task.FromException<object>(new NotImplementedException());
    }