How to write an “awaitable” method?

Question

I\'m finally looking into the async & await keywords, which I kind of "get", but all the examples I\'ve seen call async methods in the .Net framework, e.g. thi

Answer 1

Just convert your method to Task. Like @Romiox I usually use this extention:

public static partial class Ext
{
    #region Public Methods
    public static Task ToTask(Action action)
    {
        return Task.Run(action);
    }
    public static Task ToTask(Func function)
    {
        return Task.Run(function);
    }
    public static async Task ToTaskAsync(Action action)
    {
        return await Task.Run(action);
    }
    public static async Task ToTaskAsync(Func function)
    {
        return await Task.Run(function);
    }
    #endregion Public Methods
}

Now let we say you have

void foo1()...

void foo2(int i1)...

int foo3()...

int foo4(int i1)...

...

Then you can declare your[async Method] like @Romiox

async Task foo1Async()
{
    return await Ext.ToTask(() => foo1());
}
async Task foo2Async(int i1)
{
    return await Ext.ToTask(() => foo2(i1));
}
async Task foo3Async()
{
    return await Ext.ToTask(() => foo3());
}
async Task foo4Async(int i1)
{
    return await Ext.ToTask(() => foo4(i1));
}

OR

async Task foo1Async()
{
    return await Ext.ToTaskAsync(() => foo1());
}
async Task foo2Async(int i1)
{
    return await Ext.ToTaskAsync(() => foo2(i1));
}
async Task foo3Async()
{
    return await Ext.ToTaskAsync(() => foo3());
}
async Task foo4Async(int i1)
{
    return await Ext.ToTaskAsync(() => foo4(i1));
}

...

Now you can use async and await for any of the fooAsync methods e.g. foo4Async

async Task TestAsync () {
    ///Initial Code
    int m = 3;
    ///Call the task
    var X = foo4Async(m);
    ///Between
    ///Do something while waiting comes here
    ///..
    var Result = await X;
    ///Final
    ///Some Code here
    return Result;
}