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CornerRadius Structure

Represents the radii of a rectangle's corners.

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

public struct CornerRadius : IEquatable<CornerRadius>
<CornerRadius .../>
<object property="TopLeft,TopRight,BottomRight,BottomLeft "/>
- or -
<object property="AllCorners"/>

XAML Values


Double value that specifies the radius of the top left corner.


Double value that specifies the top right corner.


Double value that specifies the bottom right corner.


Double value that specifies the bottom left corner.


If only a single Double value is specified, that measure is applied to ALL of the TopLeft, TopRight, BottomRight, and BottomLeft corners of the CornerRadius.


Values need not include the decimal point explicitly when specified as a string. The string "1" provided in XAML evaluates to a value of 1.0 when referenced in code.

This class has four properties, TopLeft, TopRight, BottomLeft, and BottomRight, corresponding to the individual corners of the rectangle. Each is a Double structure that can be set independently of the others.

The radii cannot be negative.

The following example shows how to set the value of the CornerRadius property by using Extensible Application Markup Language (XAML) and code.

myBorder1 = new Border();
myBorder1.BorderBrush = Brushes.SlateBlue;
myBorder1.BorderThickness = new Thickness(5, 10, 15, 20);
myBorder1.Background = Brushes.AliceBlue;
myBorder1.Padding = new Thickness(5);
myBorder1.CornerRadius = new CornerRadius(15);
<Border BorderBrush="SlateBlue" BorderThickness="5,10,15,20" Background="AliceBlue" Padding="5" CornerRadius="15">

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