TaskFactory.StartNew<TResult> Method (Func<TResult>)
[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]
Creates and starts a Task<TResult>.
Assembly: mscorlib (in mscorlib.dll)
Type Parameters
- TResult
The type of the result available through the Task<TResult>.
Parameters
- function
- Type: System.Func<TResult>
A function delegate that returns the future result to be available through the Task<TResult>.
| Exception | Condition |
|---|---|
| ArgumentNullException | The exception that is thrown when the function argument is null. |
Calling StartNew is functionally equivalent to creating a Task<TResult> using one of its constructors and then calling Start to schedule it for execution.
However, unless creation and scheduling must be separated, StartNew is the recommended approach for both simplicity and performance.
This example demonstrates retrieving the asynchronous result generated by a task.
// C#
var pi = Task<string>.Factory.StartNew(() => ComputePi(numDigits));
...
Console.WriteLine(pi.Result);
' Visual Basic
Dim pi = Task(Of String).Factory.StartNew(Function() ComputePi(numDigits))
...
Console.WriteLine(pi.Result)