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Duration.Subtraction Operator

Subtracts the value of one instance of Duration from another.

Namespace:  System.Windows
Assembly:  PresentationCore (in PresentationCore.dll)

static let inline (-)
        t1:Duration * 
        t2:Duration  : Duration


Type: System.Windows.Duration

The first instance of Duration.

Type: System.Windows.Duration

The instance of Duration to subtract.

Return Value

Type: System.Windows.Duration
If both instances of Duration have values, an instance of Duration that represents the value of t1 minus t2. If t1 has a value of Forever and t2 has a value of TimeSpan, this method returns Forever. Otherwise this method returns a null reference (Nothing in Visual Basic).

The following calculations all return a value of Automatic.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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