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 7, Windows Vista SP2, Windows XP SP3, Windows XP x64 SP2, Windows Server 2008 R2, Windows Server 2008 SP2, Windows Server 2003 SP2

Version Information

F# Runtime

Supported in: 2.0, 4.0

Silverlight

Supported in: 3

See Also

Reference

Core.Option<'T> Union (F#)

Microsoft.FSharp.Core Namespace (F#)