Indicates whether a specified string is nullptr, empty, or consists only of white-space characters.
Assembly: mscorlib (in mscorlib.dll)
is a convenience method that is similar to the following code, except that it offers superior performance:
White-space characters are defined by the Unicode standard. The method interprets any character that returns a value of true when it is passed to the Char::IsWhiteSpace method as a white-space character.
.NET FrameworkSupported in: 4.5, 4
.NET Framework Client ProfileSupported in: 4
Portable Class LibrarySupported in: Portable Class Library
.NET for Windows Store appsSupported in: Windows 8
.NET for Windows Phone appsSupported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8
Windows Phone 8.1, Windows Phone 8, 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.