Task MethodName()

Question

Hi all

I've just come across this and can work out what the "Task<long?>" mean. Has anyone got an explanation or can point me to somewhere that explains it.

Thanks

Which part? The `Task` or the [`Nullable`](http://msdn.microsoft.com/en-us/library/1t3y8s4s%28v=vs.80%29.aspx)? — Patryk Ćwiek, Jul 10 '13 at 08:12
Well, it *doesn't* mean that the programmer didn't know if the `Task` would run for a `long` time or not. ^_^; — Corak, Jul 10 '13 at 08:32

score 1 · Accepted Answer · answered Jul 10 '13 at 08:12

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See MSDN documentation of System.Threading.Tasks.Task<TResult> :

Asynchronous operation

long? is the type parameter, which is a nullable long. It could be written as

Task<Nullable<long>>

answered Jul 10 '13 at 08:12

Sam Leach

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score 1 · Answer 2 · edited May 23 '17 at 10:32

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I'm not sure which part of Task<long?> you don't get, so:

Task<T> is a generic class used within Task Parallel Library to represent asynchronous operation.

long? is a shortcut for Nullable<long>: ? (nullable) operator in C#

edited May 23 '17 at 10:32

Community

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answered Jul 10 '13 at 08:14

MarcinJuraszek

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score 1 · Answer 3 · answered Jul 10 '13 at 08:15

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You would want to read up on Generics in the .NET Framework. Basically, generics are a way to create parametrized types. In your example there's a generic type Task<T>, which is parametrized with long?, which is a nullable long value.

answered Jul 10 '13 at 08:15

Trogvar

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Task MethodName()

3 Answers3