using static System.Console;
public static class Program {
const string interpolado = "{0}";
public static void Main (string [] args) {
var firstName = "fred";
WriteLine(interpolado, firstName);
var texto = string.Format(interpolado, firstName);
WriteLine(texto);
}
}
//https://pt.stackoverflow.com/q/136458/101
dXNpbmcgc3RhdGljIFN5c3RlbS5Db25zb2xlOwoJCQkJCQpwdWJsaWMgc3RhdGljIGNsYXNzIFByb2dyYW0gewogICAgY29uc3Qgc3RyaW5nIGludGVycG9sYWRvID0gInswfSI7IAoKICAgIHB1YmxpYyBzdGF0aWMgdm9pZCBNYWluIChzdHJpbmcgW10gYXJncykgewogICAgICAgIHZhciBmaXJzdE5hbWUgPSAiZnJlZCI7CiAgICAgICAgV3JpdGVMaW5lKGludGVycG9sYWRvLCBmaXJzdE5hbWUpOwoJCXZhciB0ZXh0byA9IHN0cmluZy5Gb3JtYXQoaW50ZXJwb2xhZG8sIGZpcnN0TmFtZSk7CiAgICAgICAgV3JpdGVMaW5lKHRleHRvKTsKICAgICB9Cn0KCi8vaHR0cHM6Ly9wdC5zdGFja292ZXJmbG93LmNvbS9xLzEzNjQ1OC8xMDE=