Option.IsNone<'T> Property (F#)
Evaluates whether the option has no actual value and is set to None.
Namespace/Module Path: Microsoft.FSharp.Core
Assembly: FSharp.Core (in FSharp.Core.dll)
// Signature:
member this.IsNone : bool
// Usage:
option.IsNone
Return Value
Returns true if the option is a None value.
Platforms
Windows 8, Windows 7, Windows Server 2012, Windows Server 2008 R2
Version Information
F# Core Library Versions
Supported in: 2.0, 4.0, Portable