Returns the approximate width of the display, in characters.
Assembly: System.Web (in System.Web.dll)
The returned value can be derived from the assumed character size and actual screen pixel size. The algorithm for determining the width uses a combination of the default font sizes (from a .config file), device-specific sizes (again, from a .config file), and explicit headers sent by the devices. These values are not necessarily exact (especially for variable-width fonts, these values are approximate). Some devices might rely on internal default values, which only approximate the actual width.
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.