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.NET Framework Class Library
ControlFontSize Property

Gets or sets the font size.

Namespace:   System.Windows.Controls
Assembly:  PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation
Syntax
<[%$TOPIC/ms592514_en-us_VS_110_1_0_0_0_0%]([%$TOPIC/ms592514_en-us_VS_110_1_0_0_0_1%].None)> _
<[%$TOPIC/ms592514_en-us_VS_110_1_0_0_0_2%](GetType([%$TOPIC/ms592514_en-us_VS_110_1_0_0_0_3%]))> _
<[%$TOPIC/ms592514_en-us_VS_110_1_0_0_0_4%](True)> _
Public Property FontSize As [%$TOPIC/ms592514_en-us_VS_110_1_0_0_0_5%]
[[%$TOPIC/ms592514_en-us_VS_110_1_0_1_0_0%]([%$TOPIC/ms592514_en-us_VS_110_1_0_1_0_1%].None)]
[[%$TOPIC/ms592514_en-us_VS_110_1_0_1_0_2%](typeof([%$TOPIC/ms592514_en-us_VS_110_1_0_1_0_3%]))]
[[%$TOPIC/ms592514_en-us_VS_110_1_0_1_0_4%](true)]
public [%$TOPIC/ms592514_en-us_VS_110_1_0_1_0_5%] FontSize { get; set; }
[[%$TOPIC/ms592514_en-us_VS_110_1_0_2_0_0%]([%$TOPIC/ms592514_en-us_VS_110_1_0_2_0_1%]::None)]
[[%$TOPIC/ms592514_en-us_VS_110_1_0_2_0_2%](typeof([%$TOPIC/ms592514_en-us_VS_110_1_0_2_0_3%]))]
[[%$TOPIC/ms592514_en-us_VS_110_1_0_2_0_4%](true)]
public:
property [%$TOPIC/ms592514_en-us_VS_110_1_0_2_0_5%] FontSize {
	[%$TOPIC/ms592514_en-us_VS_110_1_0_2_0_6%] get ();
	void set ([%$TOPIC/ms592514_en-us_VS_110_1_0_2_0_7%] value);
}
[<[%$TOPIC/ms592514_en-us_VS_110_1_0_3_0_0%]([%$TOPIC/ms592514_en-us_VS_110_1_0_3_0_1%].None)>]
[<[%$TOPIC/ms592514_en-us_VS_110_1_0_3_0_2%](typeof([%$TOPIC/ms592514_en-us_VS_110_1_0_3_0_3%]))>]
[<[%$TOPIC/ms592514_en-us_VS_110_1_0_3_0_4%](true)>]
member FontSize : [%$TOPIC/ms592514_en-us_VS_110_1_0_3_0_5%] with get, set
<object FontSize="double"/>
- or –
<object FontSize ="qualifiedDouble"/>

XAML Values

double

Double

A string representation of a Double value. This is interpreted as a device-independent unit (1/96th inch) measurement. Strings need not explicitly include decimal points. For example, a value of 1 is acceptable.

The same Double range restrictions that are mentioned in the Property Value section apply here.

qualifiedDouble

A double value as previously described that is followed by one of these unit declaration strings: px, in, cm, pt.

px (default) is device-independent units (1/96th inch per unit)

in is inches; 1in==96px

cm is centimeters; 1cm==(96/2.54) px

pt is points; 1pt==(96/72) px

Note   In many cases a double may be set to "Auto," but a ControlFontSize does not render if set to "Auto".

Property Value

Type: SystemDouble
The size of the text in the Control. The default is SystemFontsMessageFontSize. The font size must be a positive number.
Remarks

This property only affects a control whose template uses the FontSize property as a parameter. On other controls, this property has no impact.

Examples

The following example shows how to set the font size property of a control.

<Button Name="btn3" FontSize="10.0" 
        Click="ChangeFontSize">
  FontSize
</Button>
Private Sub ChangeFontSize(ByVal Sender As Object, ByVal e As RoutedEventArgs)

    fsize = btn3.FontSize
    If (fsize = 16.0) Then

        btn3.FontSize = 10.0
        btn3.Content = "FontSize" 

    Else

        btn3.FontSize = 16.0
        btn3.Content = "Control font size changes from 10 to 16." 
    End If 
End Sub
void ChangeFontSize(object sender, RoutedEventArgs e)
{
    fsize = btn3.FontSize;
    if (fsize == 16.0)
    {
        btn3.FontSize = 10.0;
        btn3.Content = "FontSize";
    }
    else
    {
        btn3.FontSize = 16.0;
        btn3.Content = "Control font size changes from 10 to 16.";
    }
}
Version Information

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
Platforms

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.