.NET Framework 4.6 and 4.5
(in System.Threading.Tasks.dll) mscorlib
static member None : CancellationToken with get
The cancellation token returned by this property cannot be canceled; that is, its CanBeCanceled property is false.
You can also use the C# default(CancellationToken) statement to create an empty cancellation token.
Supported in: 4.6, 4.5, 4
.NET Framework Client Profile
Supported in: 4
Portable Class Library
Supported in: Portable Class Library
Supported in: Windows Phone 8.1
Supported in: Windows Phone Silverlight 8.1
Supported in: Windows Phone Silverlight 8