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RoutedPropertyChangedEventArgs<T>.OldValue Property

Gets the previous value of the property as reported by a property changed event.

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

public T OldValue { get; }
Members of this class are either not typically used in XAML, or cannot be used in XAML.

Property Value

Type: T
The generic value. In a practical implementation of the RoutedPropertyChangedEventArgs<T>, the generic type of this property is replaced with the constrained type of the implementation.

The value and type constraint of this property will be established by the RoutedPropertyChangedEventArgs<T> constructor's type arguments.

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

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

.NET Framework

Supported in: 3.5, 3.0

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