Gets or sets the styling class in a cascading style sheet (CSS) file that controls the font family, font size, and possibly other aspects of how the text of the field is rendered.
Assembly: Microsoft.SharePoint (in Microsoft.SharePoint.dll)
The default implementation sets to "ms-input". This is defined in a CSS file one of the subfolders under %ProgramFiles%\Common Files\Microsoft Shared\web server extensions\15\TEMPLATE. If no customized themes have been created for the SharePoint deployment, the CSS file used is CORE.CSS in ...\TEMPLATE\LAYOUTS\1033\STYLES.