The startIndex parameter is zero-based. That is, the index of the first character in the string instance is zero.
If length is zero, the returned array is empty and has a zero length. If this instance is a null reference (Nothing in Visual Basic) or an empty string (""), the returned array is empty and has a zero length.
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)