It can be like this:
Set< string & gtset = new HashSet & lt string & gt ();
String? s 1£¿ = "Hello";
String s2 = " world
set . add(s 1)£»
set . add(S2)£»
Chapter 1: Summary of environmental protection work in the first quarter.
In 20 18, under the correct leadership of the county party Committee a