Expression Class
This type supports the Windows Presentation Foundation (WPF) infrastructure and is not intended to be used directly from your code.
Assembly: WindowsBase (in WindowsBase.dll)
No member of this class is public. The class supports expression modes for setting dependency property values, such as DynamicResourceExtension and Binding.
System.Windows.Expression
System.Windows.Data.BindingExpressionBase
System.Windows.TemplateBindingExpression
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.