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RuntimeNamePropertyAttribute Class

Specifies the property of a class that maps to the XAML x:Name attribute.

Namespace:  System.Windows.Markup
Assembly:  WindowsBase (in WindowsBase.dll)

public sealed class RuntimeNamePropertyAttribute : Attribute
You cannot directly create an instance of this class in XAML.

The property that is specified in the RuntimeNamePropertyAttribute must of type String and must be read/write.

A XAML name value must use the XamlName Grammar.

An example of an existing class in Windows Presentation Foundation (WPF) where the RuntimeNamePropertyAttribute is applied is FrameworkElement. The Name property on FrameworkElement is set as the runtime name property, which results in any FrameworkElement derived class also using Name as its runtime name property.

In general, you do not typically need to apply this attribute unless you are implementing a new or FrameworkElement-parallel framework-level class.

The following example creates a class named Book, with the RuntimeNamePropertyAttribute applied. The property named BookID is set as the runtime name property.

public class Book
    public Book()

    public string BookID
        get { return _bookID; }
        set { _bookID = value; }

    private string _bookID = string.Empty;


Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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