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I'm following the tutorial at https://discord.foxbot.me/docs/guides/getting_started/intro.html to a tee, and yet I'm getting an error when I try to use
return Task.CompletedTask
and I get this error
'Task' does not contain a definition for 'CompletedTask'
I am
using System.Threading.Tasks
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Task. CompletedTask property is important when you need to give a caller a dummy Task (that doesn't return a value/result) that's already completed. This might be necessary to fulfill an "interface" contract or testing purposes. Task. FromResult(data) also returns a dummy Task, but this time with data or a result.
Returning null from a non-async Task-returning method One way to prevent this NRE while still returning null is to check that the result of the method is not null and await a valid Task if it is. We can do this with the null-coalescing operator; for example: result = await (NonAsyncFoo() ?? Task.
You can think of it as being lazy, if you await a task that is already completed it returns immediately. You could await it several times on different threads and it would only return once it has the result (or is faulted). Task.
If you are unable to upgrade the .NET Framework version, simply
replace Task.CompletedTask with Task.FromResult(0).
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Task.CompletedTask is a static property added in .NET 4.6. Here is its source, and here is its MSDN page which shows the minimum framework version.
Just for completeness, here is how you change the .NET Framework version you are using in your project.
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