Calling this method is equivalent to calling the Set method on the collection returned by the Headers property.
If the header specified in name does not exist, this method inserts a new header into the Headers property's collection. If name is present in the collection, this method replaces the existing value with value. To add a value to an existing header without replacing the existing value, use the AppendHeader method.
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)