concatenare due stringhe

[Franz78]

StringBuilder sb = new StringBuilder();
sb.Append("stringa1");
sb.Append(" ");
sb.Append("stringa2");

Response.Write(sb.ToString()); 

ma anke

string stringa1 = "ciao";
string stringa2 = "latindance85";

stirng stringa3 = stringa1 + " " + stringa2;