Gets or sets the font size for the content of the element.
Assembly: System.Windows (in System.Windows.dll)
Dependency property identifier field: FontSizeProperty
In Windows Presentation Foundation (WPF), the XAML values for can include a unit qualifier such as "pt" or "px". However, these unit qualifiers are not supported in Silverlight. You must specify a numeric value only, which is always interpreted as pixels. If you are importing XAML UI definitions from WPF, you must adjust the attribute values to strip the unit qualifiers, including "px" (this might also involve converting the previous units to pixel values). Otherwise, parsing the XAML will fail.
does not affect the height of the line break. Only the set on the text runs themselves has any effect. The line height for a LineBreak is influenced by the surrounding runs, but multiple line breaks in succession use the default 11 pixel height. (LineStackingStrategy can also influence this spacing.)
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.