Set.add<'T> Function (F#)

Returns a new set with an element added to the set. No exception is raised if the set already contains the given element.

Namespace/Module Path: Microsoft.FSharp.Collections.Set

Assembly: FSharp.Core (in FSharp.Core.dll)

// Signature:
Set.add : 'T -> Set<'T> -> Set<'T> (requires comparison)

// Usage:
Set.add value set


  • value
    Type: 'T

    The value to add.

  • set
    Type: Set<'T>

    The input set.

Return Value

A new set containing value.


This function is named Add in compiled assemblies. If you are accessing the function from a language other than F#, or through reflection, use this name.


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


Supported in: 3

See Also


Collections.Set Module (F#)

Microsoft.FSharp.Collections Namespace (F#)