string x = " Hello World! ";
string y = x.Trim(); // "Hello World!"
string q = "{(Hi!*";
string r = q.Trim( '(', '*', '{' ); // "Hi!"
String.TrimStart()
and
String.TrimEnd()
#
string q = "{(Hi*";
string r = q.TrimStart( '{' ); // "(Hi*"
string s = q.TrimEnd( '*' ); // "{(Hi"