Map.Item<'Key,'Value> Property (F#)

Lookup an element in the map. Raise KeyNotFoundException if no binding exists in the map.

Namespace/Module Path: Microsoft.FSharp.Collections

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

// Signature:
member this.Item ('Key) : 'Value (requires comparison)

// Usage:
map.[key]

key

Type: 'Key

The input key.

Exception

Condition

KeyNotFoundException

Thrown when the key is not found.

The value mapped to the key.

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

F# Runtime

Supported in: 2.0, 4.0

Silverlight

Supported in: 3

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