long l;
string strLong = "1";

Stopwatch s = new Stopwatch();
s.Start();
for(int i = 0; i < 10000000; i++) {
    long.TryParse(strLong, out l);
}
s.Stop();
s.ElapsedMilliseconds.Dump("Try Parse:");
s.Restart();
for(int i = 0; i < 10000000; i++) {
    long.Parse(strLong);
}
s.ElapsedMilliseconds.Dump("Parse:");